21252016

素因数分解:

$2^4\times {\mathrm{101}}^1\times {\mathrm{13151}}^1$

素因数の和:13260

約数の個数: 20

約数和(自身を含む): 41586624

約数和(自身を除く): 20334608

約数列:

[1, 2, 4, 8, 16, 101, 202, 404, 808, 1616, 13151, 26302, 52604, 105208, 210416, 1328251, 2656502, 5313004, 10626008, 21252016]

約数ペア:

[(1, 21252016), (2, 10626008), (4, 5313004), (8, 2656502), (16, 1328251), (101, 210416), (202, 105208), (404, 52604), (808, 26302), (1616, 13151)]