21958280

素因数分解:

$2^3\times 5^1\times {\mathrm{548957}}^1$

素因数の和:548968

約数の個数: 16

約数和(自身を含む): 49406220

約数和(自身を除く): 27447940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 548957, 1097914, 2195828, 2744785, 4391656, 5489570, 10979140, 21958280]

約数ペア:

[(1, 21958280), (2, 10979140), (4, 5489570), (5, 4391656), (8, 2744785), (10, 2195828), (20, 1097914), (40, 548957)]