21690991

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{941}}^1$

素因数の和:1074

約数の個数: 16

約数和(自身を含む): 25773120

約数和(自身を除く): 4082129

約数列:

[1, 7, 37, 89, 259, 623, 941, 3293, 6587, 23051, 34817, 83749, 243719, 586243, 3098713, 21690991]

約数ペア:

[(1, 21690991), (7, 3098713), (37, 586243), (89, 243719), (259, 83749), (623, 34817), (941, 23051), (3293, 6587)]