21025991

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{1621}}^1$

素因数の和:1754

約数の個数: 16

約数和(自身を含む): 25692480

約数和(自身を除く): 4666489

約数列:

[1, 7, 17, 109, 119, 763, 1621, 1853, 11347, 12971, 27557, 176689, 192899, 1236823, 3003713, 21025991]

約数ペア:

[(1, 21025991), (7, 3003713), (17, 1236823), (109, 192899), (119, 176689), (763, 27557), (1621, 12971), (1853, 11347)]