21336640

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{223}}^1$

素因数の和:276

約数の個数: 112

約数和(自身を含む): 57351168

約数和(自身を除く): 36014528

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 26, 32, 40, 46, 52, 64, 65, 80, 92, 104, 115, 130, 160, 184, 208, 223, 230, 260, 299, 320, 368, 416, 446, 460, 520, 598, 736, 832, 892, 920, 1040, 1115, 1196, 1472, 1495, 1784, 1840, 2080, 2230, 2392, 2899, 2990, 3568, 3680, 4160, 4460, 4784, 5129, 5798, 5980, 7136, 7360, 8920, 9568, 10258, 11596, 11960, 14272, 14495, 17840, 19136, 20516, 23192, 23920, 25645, 28990, 35680, 41032, 46384, 47840, 51290, 57980, 66677, 71360, 82064, 92768, 95680, 102580, 115960, 133354, 164128, 185536, 205160, 231920, 266708, 328256, 333385, 410320, 463840, 533416, 666770, 820640, 927680, 1066832, 1333540, 1641280, 2133664, 2667080, 4267328, 5334160, 10668320, 21336640]

約数ペア:

[(1, 21336640), (2, 10668320), (4, 5334160), (5, 4267328), (8, 2667080), (10, 2133664), (13, 1641280), (16, 1333540), (20, 1066832), (23, 927680), (26, 820640), (32, 666770), (40, 533416), (46, 463840), (52, 410320), (64, 333385), (65, 328256), (80, 266708), (92, 231920), (104, 205160), (115, 185536), (130, 164128), (160, 133354), (184, 115960), (208, 102580), (223, 95680), (230, 92768), (260, 82064), (299, 71360), (320, 66677), (368, 57980), (416, 51290), (446, 47840), (460, 46384), (520, 41032), (598, 35680), (736, 28990), (832, 25645), (892, 23920), (920, 23192), (1040, 20516), (1115, 19136), (1196, 17840), (1472, 14495), (1495, 14272), (1784, 11960), (1840, 11596), (2080, 10258), (2230, 9568), (2392, 8920), (2899, 7360), (2990, 7136), (3568, 5980), (3680, 5798), (4160, 5129), (4460, 4784)]