21353120

素因数分解:

$2^5\times 5^1\times {\mathrm{317}}^1\times {\mathrm{421}}^1$

素因数の和:753

約数の個数: 48

約数和(自身を含む): 50726088

約数和(自身を除く): 29372968

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 317, 421, 634, 842, 1268, 1585, 1684, 2105, 2536, 3170, 3368, 4210, 5072, 6340, 6736, 8420, 10144, 12680, 13472, 16840, 25360, 33680, 50720, 67360, 133457, 266914, 533828, 667285, 1067656, 1334570, 2135312, 2669140, 4270624, 5338280, 10676560, 21353120]

約数ペア:

[(1, 21353120), (2, 10676560), (4, 5338280), (5, 4270624), (8, 2669140), (10, 2135312), (16, 1334570), (20, 1067656), (32, 667285), (40, 533828), (80, 266914), (160, 133457), (317, 67360), (421, 50720), (634, 33680), (842, 25360), (1268, 16840), (1585, 13472), (1684, 12680), (2105, 10144), (2536, 8420), (3170, 6736), (3368, 6340), (4210, 5072)]