21013640

素因数分解:

$2^3\times 5^1\times {\mathrm{613}}^1\times {\mathrm{857}}^1$

素因数の和:1481

約数の個数: 32

約数和(自身を含む): 47413080

約数和(自身を除く): 26399440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 613, 857, 1226, 1714, 2452, 3065, 3428, 4285, 4904, 6130, 6856, 8570, 12260, 17140, 24520, 34280, 525341, 1050682, 2101364, 2626705, 4202728, 5253410, 10506820, 21013640]

約数ペア:

[(1, 21013640), (2, 10506820), (4, 5253410), (5, 4202728), (8, 2626705), (10, 2101364), (20, 1050682), (40, 525341), (613, 34280), (857, 24520), (1226, 17140), (1714, 12260), (2452, 8570), (3065, 6856), (3428, 6130), (4285, 4904)]