21978665

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{3697}}^1$

素因数の和:3772

約数の個数: 16

約数和(自身を含む): 27956880

約数和(自身を除く): 5978215

約数列:

[1, 5, 29, 41, 145, 205, 1189, 3697, 5945, 18485, 107213, 151577, 536065, 757885, 4395733, 21978665]

約数ペア:

[(1, 21978665), (5, 4395733), (29, 757885), (41, 536065), (145, 151577), (205, 107213), (1189, 18485), (3697, 5945)]