20851560

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{449}}^1$

素因数の和:512

約数の個数: 128

約数和(自身を含む): 71280000

約数和(自身を除く): 50428440

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 43, 45, 54, 60, 72, 86, 90, 108, 120, 129, 135, 172, 180, 215, 216, 258, 270, 344, 360, 387, 430, 449, 516, 540, 645, 774, 860, 898, 1032, 1080, 1161, 1290, 1347, 1548, 1720, 1796, 1935, 2245, 2322, 2580, 2694, 3096, 3592, 3870, 4041, 4490, 4644, 5160, 5388, 5805, 6735, 7740, 8082, 8980, 9288, 10776, 11610, 12123, 13470, 15480, 16164, 17960, 19307, 20205, 23220, 24246, 26940, 32328, 38614, 40410, 46440, 48492, 53880, 57921, 60615, 77228, 80820, 96535, 96984, 115842, 121230, 154456, 161640, 173763, 193070, 231684, 242460, 289605, 347526, 386140, 463368, 484920, 521289, 579210, 695052, 772280, 868815, 1042578, 1158420, 1390104, 1737630, 2085156, 2316840, 2606445, 3475260, 4170312, 5212890, 6950520, 10425780, 20851560]

約数ペア:

[(1, 20851560), (2, 10425780), (3, 6950520), (4, 5212890), (5, 4170312), (6, 3475260), (8, 2606445), (9, 2316840), (10, 2085156), (12, 1737630), (15, 1390104), (18, 1158420), (20, 1042578), (24, 868815), (27, 772280), (30, 695052), (36, 579210), (40, 521289), (43, 484920), (45, 463368), (54, 386140), (60, 347526), (72, 289605), (86, 242460), (90, 231684), (108, 193070), (120, 173763), (129, 161640), (135, 154456), (172, 121230), (180, 115842), (215, 96984), (216, 96535), (258, 80820), (270, 77228), (344, 60615), (360, 57921), (387, 53880), (430, 48492), (449, 46440), (516, 40410), (540, 38614), (645, 32328), (774, 26940), (860, 24246), (898, 23220), (1032, 20205), (1080, 19307), (1161, 17960), (1290, 16164), (1347, 15480), (1548, 13470), (1720, 12123), (1796, 11610), (1935, 10776), (2245, 9288), (2322, 8980), (2580, 8082), (2694, 7740), (3096, 6735), (3592, 5805), (3870, 5388), (4041, 5160), (4490, 4644)]