21172745

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20261}}^1$

素因数の和:20296

約数の個数: 16

約数和(自身を含む): 29177280

約数和(自身を除く): 8004535

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20261, 101305, 222871, 384959, 1114355, 1924795, 4234549, 21172745]

約数ペア:

[(1, 21172745), (5, 4234549), (11, 1924795), (19, 1114355), (55, 384959), (95, 222871), (209, 101305), (1045, 20261)]