21581360

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{317}}^1$

素因数の和:390

約数の個数: 80

約数和(自身を含む): 53942976

約数和(自身を除く): 32361616

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 37, 40, 46, 74, 80, 92, 115, 148, 184, 185, 230, 296, 317, 368, 370, 460, 592, 634, 740, 851, 920, 1268, 1480, 1585, 1702, 1840, 2536, 2960, 3170, 3404, 4255, 5072, 6340, 6808, 7291, 8510, 11729, 12680, 13616, 14582, 17020, 23458, 25360, 29164, 34040, 36455, 46916, 58328, 58645, 68080, 72910, 93832, 116656, 117290, 145820, 187664, 234580, 269767, 291640, 469160, 539534, 583280, 938320, 1079068, 1348835, 2158136, 2697670, 4316272, 5395340, 10790680, 21581360]

約数ペア:

[(1, 21581360), (2, 10790680), (4, 5395340), (5, 4316272), (8, 2697670), (10, 2158136), (16, 1348835), (20, 1079068), (23, 938320), (37, 583280), (40, 539534), (46, 469160), (74, 291640), (80, 269767), (92, 234580), (115, 187664), (148, 145820), (184, 117290), (185, 116656), (230, 93832), (296, 72910), (317, 68080), (368, 58645), (370, 58328), (460, 46916), (592, 36455), (634, 34040), (740, 29164), (851, 25360), (920, 23458), (1268, 17020), (1480, 14582), (1585, 13616), (1702, 12680), (1840, 11729), (2536, 8510), (2960, 7291), (3170, 6808), (3404, 6340), (4255, 5072)]