21279440

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1$

素因数の和:149

約数の個数: 160

約数和(自身を含む): 63329280

約数和(自身を除く): 42049840

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 37, 40, 52, 56, 65, 70, 74, 79, 80, 91, 104, 112, 130, 140, 148, 158, 182, 185, 208, 259, 260, 280, 296, 316, 364, 370, 395, 455, 481, 518, 520, 553, 560, 592, 632, 728, 740, 790, 910, 962, 1027, 1036, 1040, 1106, 1264, 1295, 1456, 1480, 1580, 1820, 1924, 2054, 2072, 2212, 2405, 2590, 2765, 2923, 2960, 3160, 3367, 3640, 3848, 4108, 4144, 4424, 4810, 5135, 5180, 5530, 5846, 6320, 6734, 7189, 7280, 7696, 8216, 8848, 9620, 10270, 10360, 11060, 11692, 13468, 14378, 14615, 16432, 16835, 19240, 20461, 20540, 20720, 22120, 23384, 26936, 28756, 29230, 33670, 35945, 37999, 38480, 40922, 41080, 44240, 46768, 53872, 57512, 58460, 67340, 71890, 75998, 81844, 82160, 102305, 115024, 116920, 134680, 143780, 151996, 163688, 189995, 204610, 233840, 265993, 269360, 287560, 303992, 327376, 379990, 409220, 531986, 575120, 607984, 759980, 818440, 1063972, 1329965, 1519960, 1636880, 2127944, 2659930, 3039920, 4255888, 5319860, 10639720, 21279440]

約数ペア:

[(1, 21279440), (2, 10639720), (4, 5319860), (5, 4255888), (7, 3039920), (8, 2659930), (10, 2127944), (13, 1636880), (14, 1519960), (16, 1329965), (20, 1063972), (26, 818440), (28, 759980), (35, 607984), (37, 575120), (40, 531986), (52, 409220), (56, 379990), (65, 327376), (70, 303992), (74, 287560), (79, 269360), (80, 265993), (91, 233840), (104, 204610), (112, 189995), (130, 163688), (140, 151996), (148, 143780), (158, 134680), (182, 116920), (185, 115024), (208, 102305), (259, 82160), (260, 81844), (280, 75998), (296, 71890), (316, 67340), (364, 58460), (370, 57512), (395, 53872), (455, 46768), (481, 44240), (518, 41080), (520, 40922), (553, 38480), (560, 37999), (592, 35945), (632, 33670), (728, 29230), (740, 28756), (790, 26936), (910, 23384), (962, 22120), (1027, 20720), (1036, 20540), (1040, 20461), (1106, 19240), (1264, 16835), (1295, 16432), (1456, 14615), (1480, 14378), (1580, 13468), (1820, 11692), (1924, 11060), (2054, 10360), (2072, 10270), (2212, 9620), (2405, 8848), (2590, 8216), (2765, 7696), (2923, 7280), (2960, 7189), (3160, 6734), (3367, 6320), (3640, 5846), (3848, 5530), (4108, 5180), (4144, 5135), (4424, 4810)]