19972680

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1$

素因数の和:124

約数の個数: 256

約数和(自身を含む): 77414400

約数和(自身を除く): 57441720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 20, 21, 24, 26, 28, 30, 31, 35, 39, 40, 42, 52, 56, 59, 60, 62, 65, 70, 78, 84, 91, 93, 104, 105, 118, 120, 124, 130, 140, 155, 156, 168, 177, 182, 186, 195, 210, 217, 236, 248, 260, 273, 280, 295, 310, 312, 354, 364, 372, 390, 403, 413, 420, 434, 455, 465, 472, 520, 546, 590, 620, 651, 708, 728, 744, 767, 780, 806, 826, 840, 868, 885, 910, 930, 1085, 1092, 1180, 1209, 1239, 1240, 1302, 1365, 1416, 1534, 1560, 1612, 1652, 1736, 1770, 1820, 1829, 1860, 2015, 2065, 2170, 2184, 2301, 2360, 2418, 2478, 2604, 2730, 2821, 3068, 3224, 3255, 3304, 3540, 3640, 3658, 3720, 3835, 4030, 4130, 4340, 4602, 4836, 4956, 5208, 5369, 5460, 5487, 5642, 6045, 6136, 6195, 6510, 7080, 7316, 7670, 8060, 8260, 8463, 8680, 9145, 9204, 9672, 9912, 10738, 10920, 10974, 11284, 11505, 12090, 12390, 12803, 13020, 14105, 14632, 15340, 16107, 16120, 16520, 16926, 18290, 18408, 21476, 21948, 22568, 23010, 23777, 24180, 24780, 25606, 26040, 26845, 27435, 28210, 30680, 32214, 33852, 36580, 38409, 42315, 42952, 43896, 46020, 47554, 48360, 49560, 51212, 53690, 54870, 56420, 64015, 64428, 67704, 71331, 73160, 76818, 80535, 84630, 92040, 95108, 102424, 107380, 109740, 112840, 118885, 128030, 128856, 142662, 153636, 161070, 166439, 169260, 190216, 192045, 214760, 219480, 237770, 256060, 285324, 307272, 322140, 332878, 338520, 356655, 384090, 475540, 499317, 512120, 570648, 644280, 665756, 713310, 768180, 832195, 951080, 998634, 1331512, 1426620, 1536360, 1664390, 1997268, 2496585, 2853240, 3328780, 3994536, 4993170, 6657560, 9986340, 19972680]

約数ペア:

[(1, 19972680), (2, 9986340), (3, 6657560), (4, 4993170), (5, 3994536), (6, 3328780), (7, 2853240), (8, 2496585), (10, 1997268), (12, 1664390), (13, 1536360), (14, 1426620), (15, 1331512), (20, 998634), (21, 951080), (24, 832195), (26, 768180), (28, 713310), (30, 665756), (31, 644280), (35, 570648), (39, 512120), (40, 499317), (42, 475540), (52, 384090), (56, 356655), (59, 338520), (60, 332878), (62, 322140), (65, 307272), (70, 285324), (78, 256060), (84, 237770), (91, 219480), (93, 214760), (104, 192045), (105, 190216), (118, 169260), (120, 166439), (124, 161070), (130, 153636), (140, 142662), (155, 128856), (156, 128030), (168, 118885), (177, 112840), (182, 109740), (186, 107380), (195, 102424), (210, 95108), (217, 92040), (236, 84630), (248, 80535), (260, 76818), (273, 73160), (280, 71331), (295, 67704), (310, 64428), (312, 64015), (354, 56420), (364, 54870), (372, 53690), (390, 51212), (403, 49560), (413, 48360), (420, 47554), (434, 46020), (455, 43896), (465, 42952), (472, 42315), (520, 38409), (546, 36580), (590, 33852), (620, 32214), (651, 30680), (708, 28210), (728, 27435), (744, 26845), (767, 26040), (780, 25606), (806, 24780), (826, 24180), (840, 23777), (868, 23010), (885, 22568), (910, 21948), (930, 21476), (1085, 18408), (1092, 18290), (1180, 16926), (1209, 16520), (1239, 16120), (1240, 16107), (1302, 15340), (1365, 14632), (1416, 14105), (1534, 13020), (1560, 12803), (1612, 12390), (1652, 12090), (1736, 11505), (1770, 11284), (1820, 10974), (1829, 10920), (1860, 10738), (2015, 9912), (2065, 9672), (2170, 9204), (2184, 9145), (2301, 8680), (2360, 8463), (2418, 8260), (2478, 8060), (2604, 7670), (2730, 7316), (2821, 7080), (3068, 6510), (3224, 6195), (3255, 6136), (3304, 6045), (3540, 5642), (3640, 5487), (3658, 5460), (3720, 5369), (3835, 5208), (4030, 4956), (4130, 4836), (4340, 4602)]