21855185

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{2531}}^1$

素因数の和:2704

約数の個数: 16

約数和(自身を含む): 28804032

約数和(自身を除く): 6948847

約数列:

[1, 5, 11, 55, 157, 785, 1727, 2531, 8635, 12655, 27841, 139205, 397367, 1986835, 4371037, 21855185]

約数ペア:

[(1, 21855185), (5, 4371037), (11, 1986835), (55, 397367), (157, 139205), (785, 27841), (1727, 12655), (2531, 8635)]