21199765

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{443}}^1\times {\mathrm{563}}^1$

素因数の和:1028

約数の個数: 16

約数和(自身を含む): 27044928

約数和(自身を除く): 5845163

約数列:

[1, 5, 17, 85, 443, 563, 2215, 2815, 7531, 9571, 37655, 47855, 249409, 1247045, 4239953, 21199765]

約数ペア:

[(1, 21199765), (5, 4239953), (17, 1247045), (85, 249409), (443, 47855), (563, 37655), (2215, 9571), (2815, 7531)]