21570440

素因数分解:

$2^3\times 5^1\times {\mathrm{539261}}^1$

素因数の和:539272

約数の個数: 16

約数和(自身を含む): 48533580

約数和(自身を除く): 26963140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 539261, 1078522, 2157044, 2696305, 4314088, 5392610, 10785220, 21570440]

約数ペア:

[(1, 21570440), (2, 10785220), (4, 5392610), (5, 4314088), (8, 2696305), (10, 2157044), (20, 1078522), (40, 539261)]