21572640

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{211}}^1$

素因数の和:303

約数の個数: 144

約数和(自身を含む): 75007296

約数和(自身を除く): 53434656

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 71, 72, 80, 90, 96, 120, 142, 144, 160, 180, 211, 213, 240, 284, 288, 355, 360, 422, 426, 480, 568, 633, 639, 710, 720, 844, 852, 1055, 1065, 1136, 1266, 1278, 1420, 1440, 1688, 1704, 1899, 2110, 2130, 2272, 2532, 2556, 2840, 3165, 3195, 3376, 3408, 3798, 4220, 4260, 5064, 5112, 5680, 6330, 6390, 6752, 6816, 7596, 8440, 8520, 9495, 10128, 10224, 11360, 12660, 12780, 14981, 15192, 16880, 17040, 18990, 20256, 20448, 25320, 25560, 29962, 30384, 33760, 34080, 37980, 44943, 50640, 51120, 59924, 60768, 74905, 75960, 89886, 101280, 102240, 119848, 134829, 149810, 151920, 179772, 224715, 239696, 269658, 299620, 303840, 359544, 449430, 479392, 539316, 599240, 674145, 719088, 898860, 1078632, 1198480, 1348290, 1438176, 1797720, 2157264, 2396960, 2696580, 3595440, 4314528, 5393160, 7190880, 10786320, 21572640]

約数ペア:

[(1, 21572640), (2, 10786320), (3, 7190880), (4, 5393160), (5, 4314528), (6, 3595440), (8, 2696580), (9, 2396960), (10, 2157264), (12, 1797720), (15, 1438176), (16, 1348290), (18, 1198480), (20, 1078632), (24, 898860), (30, 719088), (32, 674145), (36, 599240), (40, 539316), (45, 479392), (48, 449430), (60, 359544), (71, 303840), (72, 299620), (80, 269658), (90, 239696), (96, 224715), (120, 179772), (142, 151920), (144, 149810), (160, 134829), (180, 119848), (211, 102240), (213, 101280), (240, 89886), (284, 75960), (288, 74905), (355, 60768), (360, 59924), (422, 51120), (426, 50640), (480, 44943), (568, 37980), (633, 34080), (639, 33760), (710, 30384), (720, 29962), (844, 25560), (852, 25320), (1055, 20448), (1065, 20256), (1136, 18990), (1266, 17040), (1278, 16880), (1420, 15192), (1440, 14981), (1688, 12780), (1704, 12660), (1899, 11360), (2110, 10224), (2130, 10128), (2272, 9495), (2532, 8520), (2556, 8440), (2840, 7596), (3165, 6816), (3195, 6752), (3376, 6390), (3408, 6330), (3798, 5680), (4220, 5112), (4260, 5064)]