21245685

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{19949}}^1$

素因数の和:20028

約数の個数: 16

約数和(自身を含む): 34473600

約数和(自身を除く): 13227915

約数列:

[1, 3, 5, 15, 71, 213, 355, 1065, 19949, 59847, 99745, 299235, 1416379, 4249137, 7081895, 21245685]

約数ペア:

[(1, 21245685), (3, 7081895), (5, 4249137), (15, 1416379), (71, 299235), (213, 99745), (355, 59847), (1065, 19949)]