20818357

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{997}}^1$

素因数の和:1180

約数の個数: 16

約数和(自身を含む): 25229440

約数和(自身を除く): 4411083

約数列:

[1, 7, 19, 133, 157, 997, 1099, 2983, 6979, 18943, 20881, 132601, 156529, 1095703, 2974051, 20818357]

約数ペア:

[(1, 20818357), (7, 2974051), (19, 1095703), (133, 156529), (157, 132601), (997, 20881), (1099, 18943), (2983, 6979)]