21259231

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{227}}^1\times {\mathrm{787}}^1$

素因数の和:1038

約数の個数: 16

約数和(自身を含む): 25871616

約数和(自身を除く): 4612385

約数列:

[1, 7, 17, 119, 227, 787, 1589, 3859, 5509, 13379, 27013, 93653, 178649, 1250543, 3037033, 21259231]

約数ペア:

[(1, 21259231), (7, 3037033), (17, 1250543), (119, 178649), (227, 93653), (787, 27013), (1589, 13379), (3859, 5509)]