20817880

素因数分解:

$2^3\times 5^1\times {\mathrm{520447}}^1$

素因数の和:520458

約数の個数: 16

約数和(自身を含む): 46840320

約数和(自身を除く): 26022440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 520447, 1040894, 2081788, 2602235, 4163576, 5204470, 10408940, 20817880]

約数ペア:

[(1, 20817880), (2, 10408940), (4, 5204470), (5, 4163576), (8, 2602235), (10, 2081788), (20, 1040894), (40, 520447)]