21210505

素因数分解:

$5^1\times {\mathrm{97}}^1\times {\mathrm{101}}^1\times {\mathrm{433}}^1$

素因数の和:636

約数の個数: 16

約数和(自身を含む): 26029584

約数和(自身を除く): 4819079

約数列:

[1, 5, 97, 101, 433, 485, 505, 2165, 9797, 42001, 43733, 48985, 210005, 218665, 4242101, 21210505]

約数ペア:

[(1, 21210505), (5, 4242101), (97, 218665), (101, 210005), (433, 48985), (485, 43733), (505, 42001), (2165, 9797)]