21684680

素因数分解:

$2^3\times 5^1\times {\mathrm{542117}}^1$

素因数の和:542128

約数の個数: 16

約数和(自身を含む): 48790620

約数和(自身を除く): 27105940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 542117, 1084234, 2168468, 2710585, 4336936, 5421170, 10842340, 21684680]

約数ペア:

[(1, 21684680), (2, 10842340), (4, 5421170), (5, 4336936), (8, 2710585), (10, 2168468), (20, 1084234), (40, 542117)]