21213321

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{223}}^1\times {\mathrm{857}}^1$

素因数の和:1120

約数の個数: 16

約数和(自身を含む): 29213184

約数和(自身を除く): 7999863

約数列:

[1, 3, 37, 111, 223, 669, 857, 2571, 8251, 24753, 31709, 95127, 191111, 573333, 7071107, 21213321]

約数ペア:

[(1, 21213321), (3, 7071107), (37, 573333), (111, 191111), (223, 95127), (669, 31709), (857, 24753), (2571, 8251)]