20959705

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{7499}}^1$

素因数の和:7560

約数の個数: 16

約数和(自身を含む): 27720000

約数和(自身を除く): 6760295

約数列:

[1, 5, 13, 43, 65, 215, 559, 2795, 7499, 37495, 97487, 322457, 487435, 1612285, 4191941, 20959705]

約数ペア:

[(1, 20959705), (5, 4191941), (13, 1612285), (43, 487435), (65, 322457), (215, 97487), (559, 37495), (2795, 7499)]