21231880

素因数分解:

$2^3\times 5^1\times {\mathrm{530797}}^1$

素因数の和:530808

約数の個数: 16

約数和(自身を含む): 47771820

約数和(自身を除く): 26539940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 530797, 1061594, 2123188, 2653985, 4246376, 5307970, 10615940, 21231880]

約数ペア:

[(1, 21231880), (2, 10615940), (4, 5307970), (5, 4246376), (8, 2653985), (10, 2123188), (20, 1061594), (40, 530797)]