21172120

素因数分解:

$2^3\times 5^1\times {\mathrm{179}}^1\times {\mathrm{2957}}^1$

素因数の和:3147

約数の個数: 32

約数和(自身を含む): 47919600

約数和(自身を除く): 26747480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 179, 358, 716, 895, 1432, 1790, 2957, 3580, 5914, 7160, 11828, 14785, 23656, 29570, 59140, 118280, 529303, 1058606, 2117212, 2646515, 4234424, 5293030, 10586060, 21172120]

約数ペア:

[(1, 21172120), (2, 10586060), (4, 5293030), (5, 4234424), (8, 2646515), (10, 2117212), (20, 1058606), (40, 529303), (179, 118280), (358, 59140), (716, 29570), (895, 23656), (1432, 14785), (1790, 11828), (2957, 7160), (3580, 5914)]