21817960

素因数分解:

$2^3\times 5^1\times {\mathrm{545449}}^1$

素因数の和:545460

約数の個数: 16

約数和(自身を含む): 49090500

約数和(自身を除く): 27272540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 545449, 1090898, 2181796, 2727245, 4363592, 5454490, 10908980, 21817960]

約数ペア:

[(1, 21817960), (2, 10908980), (4, 5454490), (5, 4363592), (8, 2727245), (10, 2181796), (20, 1090898), (40, 545449)]