21002499

素因数分解:

$3^2\times 7^1\times {\mathrm{389}}^1\times {\mathrm{857}}^1$

素因数の和:1259

約数の個数: 24

約数和(自身を含む): 34800480

約数和(自身を除く): 13797981

約数列:

[1, 3, 7, 9, 21, 63, 389, 857, 1167, 2571, 2723, 3501, 5999, 7713, 8169, 17997, 24507, 53991, 333373, 1000119, 2333611, 3000357, 7000833, 21002499]

約数ペア:

[(1, 21002499), (3, 7000833), (7, 3000357), (9, 2333611), (21, 1000119), (63, 333373), (389, 53991), (857, 24507), (1167, 17997), (2571, 8169), (2723, 7713), (3501, 5999)]