81991000

素因数分解:

$2^3\times 5^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1$

素因数の和:111

約数の個数: 256

約数和(自身を含む): 254741760

約数和(自身を除く): 172750760

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 17, 20, 25, 26, 28, 34, 35, 40, 50, 52, 53, 56, 65, 68, 70, 85, 91, 100, 104, 106, 119, 125, 130, 136, 140, 170, 175, 182, 200, 212, 221, 238, 250, 260, 265, 280, 325, 340, 350, 364, 371, 424, 425, 442, 455, 476, 500, 520, 530, 595, 650, 680, 689, 700, 728, 742, 850, 875, 884, 901, 910, 952, 1000, 1060, 1105, 1190, 1300, 1325, 1378, 1400, 1484, 1547, 1625, 1700, 1750, 1768, 1802, 1820, 1855, 2120, 2125, 2210, 2275, 2380, 2600, 2650, 2756, 2968, 2975, 3094, 3250, 3400, 3445, 3500, 3604, 3640, 3710, 4250, 4420, 4505, 4550, 4760, 4823, 5300, 5512, 5525, 5950, 6188, 6307, 6500, 6625, 6890, 7000, 7208, 7420, 7735, 8500, 8840, 9010, 9100, 9275, 9646, 10600, 11050, 11375, 11713, 11900, 12376, 12614, 13000, 13250, 13780, 14840, 14875, 15470, 17000, 17225, 18020, 18200, 18550, 19292, 22100, 22525, 22750, 23426, 23800, 24115, 25228, 26500, 27560, 27625, 29750, 30940, 31535, 34450, 36040, 37100, 38584, 38675, 44200, 45050, 45500, 46375, 46852, 48230, 50456, 53000, 55250, 58565, 59500, 61880, 63070, 68900, 74200, 77350, 81991, 86125, 90100, 91000, 92750, 93704, 96460, 110500, 112625, 117130, 119000, 120575, 126140, 137800, 154700, 157675, 163982, 172250, 180200, 185500, 192920, 193375, 221000, 225250, 234260, 241150, 252280, 292825, 309400, 315350, 327964, 344500, 371000, 386750, 409955, 450500, 468520, 482300, 585650, 602875, 630700, 655928, 689000, 773500, 788375, 819910, 901000, 964600, 1171300, 1205750, 1261400, 1464125, 1547000, 1576750, 1639820, 2049775, 2342600, 2411500, 2928250, 3153500, 3279640, 4099550, 4823000, 5856500, 6307000, 8199100, 10248875, 11713000, 16398200, 20497750, 40995500, 81991000]

約数ペア:

[(1, 81991000), (2, 40995500), (4, 20497750), (5, 16398200), (7, 11713000), (8, 10248875), (10, 8199100), (13, 6307000), (14, 5856500), (17, 4823000), (20, 4099550), (25, 3279640), (26, 3153500), (28, 2928250), (34, 2411500), (35, 2342600), (40, 2049775), (50, 1639820), (52, 1576750), (53, 1547000), (56, 1464125), (65, 1261400), (68, 1205750), (70, 1171300), (85, 964600), (91, 901000), (100, 819910), (104, 788375), (106, 773500), (119, 689000), (125, 655928), (130, 630700), (136, 602875), (140, 585650), (170, 482300), (175, 468520), (182, 450500), (200, 409955), (212, 386750), (221, 371000), (238, 344500), (250, 327964), (260, 315350), (265, 309400), (280, 292825), (325, 252280), (340, 241150), (350, 234260), (364, 225250), (371, 221000), (424, 193375), (425, 192920), (442, 185500), (455, 180200), (476, 172250), (500, 163982), (520, 157675), (530, 154700), (595, 137800), (650, 126140), (680, 120575), (689, 119000), (700, 117130), (728, 112625), (742, 110500), (850, 96460), (875, 93704), (884, 92750), (901, 91000), (910, 90100), (952, 86125), (1000, 81991), (1060, 77350), (1105, 74200), (1190, 68900), (1300, 63070), (1325, 61880), (1378, 59500), (1400, 58565), (1484, 55250), (1547, 53000), (1625, 50456), (1700, 48230), (1750, 46852), (1768, 46375), (1802, 45500), (1820, 45050), (1855, 44200), (2120, 38675), (2125, 38584), (2210, 37100), (2275, 36040), (2380, 34450), (2600, 31535), (2650, 30940), (2756, 29750), (2968, 27625), (2975, 27560), (3094, 26500), (3250, 25228), (3400, 24115), (3445, 23800), (3500, 23426), (3604, 22750), (3640, 22525), (3710, 22100), (4250, 19292), (4420, 18550), (4505, 18200), (4550, 18020), (4760, 17225), (4823, 17000), (5300, 15470), (5512, 14875), (5525, 14840), (5950, 13780), (6188, 13250), (6307, 13000), (6500, 12614), (6625, 12376), (6890, 11900), (7000, 11713), (7208, 11375), (7420, 11050), (7735, 10600), (8500, 9646), (8840, 9275), (9010, 9100)]