21996560

素因数分解:

$2^4\times 5^1\times {\mathrm{274957}}^1$

素因数の和:274970

約数の個数: 20

約数和(自身を含む): 51142188

約数和(自身を除く): 29145628

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 274957, 549914, 1099828, 1374785, 2199656, 2749570, 4399312, 5499140, 10998280, 21996560]

約数ペア:

[(1, 21996560), (2, 10998280), (4, 5499140), (5, 4399312), (8, 2749570), (10, 2199656), (16, 1374785), (20, 1099828), (40, 549914), (80, 274957)]