21189189

素因数分解:

$3^1\times 7^1\times {\mathrm{821}}^1\times {\mathrm{1229}}^1$

素因数の和:2060

約数の個数: 16

約数和(自身を含む): 32353920

約数和(自身を除く): 11164731

約数列:

[1, 3, 7, 21, 821, 1229, 2463, 3687, 5747, 8603, 17241, 25809, 1009009, 3027027, 7063063, 21189189]

約数ペア:

[(1, 21189189), (3, 7063063), (7, 3027027), (21, 1009009), (821, 25809), (1229, 17241), (2463, 8603), (3687, 5747)]