20891158

素因数分解:

$2^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1\times {\mathrm{1571}}^1$

素因数の和:1743

約数の個数: 16

約数和(自身を含む): 32163120

約数和(自身を除く): 11271962

約数列:

[1, 2, 61, 109, 122, 218, 1571, 3142, 6649, 13298, 95831, 171239, 191662, 342478, 10445579, 20891158]

約数ペア:

[(1, 20891158), (2, 10445579), (61, 342478), (109, 191662), (122, 171239), (218, 95831), (1571, 13298), (3142, 6649)]