21466525

素因数分解:

$5^2\times {\mathrm{29}}^2\times {\mathrm{1021}}^1$

素因数の和:1089

約数の個数: 18

約数和(自身を含む): 27595022

約数和(自身を除く): 6128497

約数列:

[1, 5, 25, 29, 145, 725, 841, 1021, 4205, 5105, 21025, 25525, 29609, 148045, 740225, 858661, 4293305, 21466525]

約数ペア:

[(1, 21466525), (5, 4293305), (25, 858661), (29, 740225), (145, 148045), (725, 29609), (841, 25525), (1021, 21025), (4205, 5105)]