20838220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80147}}^1$

素因数の和:80169

約数の個数: 24

約数和(自身を含む): 47127024

約数和(自身を除く): 26288804

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80147, 160294, 320588, 400735, 801470, 1041911, 1602940, 2083822, 4167644, 5209555, 10419110, 20838220]

約数ペア:

[(1, 20838220), (2, 10419110), (4, 5209555), (5, 4167644), (10, 2083822), (13, 1602940), (20, 1041911), (26, 801470), (52, 400735), (65, 320588), (130, 160294), (260, 80147)]