21638485

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{397}}^1\times {\mathrm{991}}^1$

素因数の和:1404

約数の個数: 16

約数和(自身を含む): 28426752

約数和(自身を除く): 6788267

約数列:

[1, 5, 11, 55, 397, 991, 1985, 4367, 4955, 10901, 21835, 54505, 393427, 1967135, 4327697, 21638485]

約数ペア:

[(1, 21638485), (5, 4327697), (11, 1967135), (55, 393427), (397, 54505), (991, 21835), (1985, 10901), (4367, 4955)]