21707905

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{3257}}^1$

素因数の和:3336

約数の個数: 16

約数和(自身を含む): 27523584

約数和(自身を除く): 5815679

約数列:

[1, 5, 31, 43, 155, 215, 1333, 3257, 6665, 16285, 100967, 140051, 504835, 700255, 4341581, 21707905]

約数ペア:

[(1, 21707905), (5, 4341581), (31, 700255), (43, 504835), (155, 140051), (215, 100967), (1333, 16285), (3257, 6665)]