21304705

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{349}}^1\times {\mathrm{421}}^1$

素因数の和:804

約数の個数: 16

約数和(自身を含む): 26586000

約数和(自身を除く): 5281295

約数列:

[1, 5, 29, 145, 349, 421, 1745, 2105, 10121, 12209, 50605, 61045, 146929, 734645, 4260941, 21304705]

約数ペア:

[(1, 21304705), (5, 4260941), (29, 734645), (145, 146929), (349, 61045), (421, 50605), (1745, 12209), (2105, 10121)]