20404540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78479}}^1$

素因数の和:78501

約数の個数: 24

約数和(自身を含む): 46146240

約数和(自身を除く): 25741700

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 78479, 156958, 313916, 392395, 784790, 1020227, 1569580, 2040454, 4080908, 5101135, 10202270, 20404540]

約数ペア:

[(1, 20404540), (2, 10202270), (4, 5101135), (5, 4080908), (10, 2040454), (13, 1569580), (20, 1020227), (26, 784790), (52, 392395), (65, 313916), (130, 156958), (260, 78479)]