21462580

素因数分解:

$2^2\times 5^1\times {\mathrm{421}}^1\times {\mathrm{2549}}^1$

素因数の和:2979

約数の個数: 24

約数和(自身を含む): 45196200

約数和(自身を除く): 23733620

約数列:

[1, 2, 4, 5, 10, 20, 421, 842, 1684, 2105, 2549, 4210, 5098, 8420, 10196, 12745, 25490, 50980, 1073129, 2146258, 4292516, 5365645, 10731290, 21462580]

約数ペア:

[(1, 21462580), (2, 10731290), (4, 5365645), (5, 4292516), (10, 2146258), (20, 1073129), (421, 50980), (842, 25490), (1684, 12745), (2105, 10196), (2549, 8420), (4210, 5098)]