20715240

素因数分解:

$2^3\times 3^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{271}}^1$

素因数の和:312

約数の個数: 192

約数和(自身を含む): 78140160

約数和(自身を除く): 57424920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 20, 21, 24, 26, 28, 30, 35, 39, 40, 42, 49, 52, 56, 60, 65, 70, 78, 84, 91, 98, 104, 105, 120, 130, 140, 147, 156, 168, 182, 195, 196, 210, 245, 260, 271, 273, 280, 294, 312, 364, 390, 392, 420, 455, 490, 520, 542, 546, 588, 637, 728, 735, 780, 813, 840, 910, 980, 1084, 1092, 1176, 1274, 1355, 1365, 1470, 1560, 1626, 1820, 1897, 1911, 1960, 2168, 2184, 2548, 2710, 2730, 2940, 3185, 3252, 3523, 3640, 3794, 3822, 4065, 5096, 5420, 5460, 5691, 5880, 6370, 6504, 7046, 7588, 7644, 8130, 9485, 9555, 10569, 10840, 10920, 11382, 12740, 13279, 14092, 15176, 15288, 16260, 17615, 18970, 19110, 21138, 22764, 24661, 25480, 26558, 28184, 28455, 32520, 35230, 37940, 38220, 39837, 42276, 45528, 49322, 52845, 53116, 56910, 66395, 70460, 73983, 75880, 76440, 79674, 84552, 98644, 105690, 106232, 113820, 123305, 132790, 140920, 147966, 159348, 172627, 197288, 199185, 211380, 227640, 246610, 265580, 295932, 318696, 345254, 369915, 398370, 422760, 493220, 517881, 531160, 591864, 690508, 739830, 796740, 863135, 986440, 1035762, 1381016, 1479660, 1593480, 1726270, 2071524, 2589405, 2959320, 3452540, 4143048, 5178810, 6905080, 10357620, 20715240]

約数ペア:

[(1, 20715240), (2, 10357620), (3, 6905080), (4, 5178810), (5, 4143048), (6, 3452540), (7, 2959320), (8, 2589405), (10, 2071524), (12, 1726270), (13, 1593480), (14, 1479660), (15, 1381016), (20, 1035762), (21, 986440), (24, 863135), (26, 796740), (28, 739830), (30, 690508), (35, 591864), (39, 531160), (40, 517881), (42, 493220), (49, 422760), (52, 398370), (56, 369915), (60, 345254), (65, 318696), (70, 295932), (78, 265580), (84, 246610), (91, 227640), (98, 211380), (104, 199185), (105, 197288), (120, 172627), (130, 159348), (140, 147966), (147, 140920), (156, 132790), (168, 123305), (182, 113820), (195, 106232), (196, 105690), (210, 98644), (245, 84552), (260, 79674), (271, 76440), (273, 75880), (280, 73983), (294, 70460), (312, 66395), (364, 56910), (390, 53116), (392, 52845), (420, 49322), (455, 45528), (490, 42276), (520, 39837), (542, 38220), (546, 37940), (588, 35230), (637, 32520), (728, 28455), (735, 28184), (780, 26558), (813, 25480), (840, 24661), (910, 22764), (980, 21138), (1084, 19110), (1092, 18970), (1176, 17615), (1274, 16260), (1355, 15288), (1365, 15176), (1470, 14092), (1560, 13279), (1626, 12740), (1820, 11382), (1897, 10920), (1911, 10840), (1960, 10569), (2168, 9555), (2184, 9485), (2548, 8130), (2710, 7644), (2730, 7588), (2940, 7046), (3185, 6504), (3252, 6370), (3523, 5880), (3640, 5691), (3794, 5460), (3822, 5420), (4065, 5096)]