21752980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{15319}}^1$

素因数の和:15399

約数の個数: 24

約数和(自身を含む): 46327680

約数和(自身を除く): 24574700

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 15319, 30638, 61276, 76595, 153190, 306380, 1087649, 2175298, 4350596, 5438245, 10876490, 21752980]

約数ペア:

[(1, 21752980), (2, 10876490), (4, 5438245), (5, 4350596), (10, 2175298), (20, 1087649), (71, 306380), (142, 153190), (284, 76595), (355, 61276), (710, 30638), (1420, 15319)]