18977915

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{3877}}^1$

素因数の和:3982

約数の個数: 16

約数和(自身を含む): 25129440

約数和(自身を除く): 6151525

約数列:

[1, 5, 11, 55, 89, 445, 979, 3877, 4895, 19385, 42647, 213235, 345053, 1725265, 3795583, 18977915]

約数ペア:

[(1, 18977915), (5, 3795583), (11, 1725265), (55, 345053), (89, 213235), (445, 42647), (979, 19385), (3877, 4895)]