20485580

素因数分解:

$2^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{5659}}^1$

素因数の和:5849

約数の個数: 24

約数和(自身を含む): 43265040

約数和(自身を除く): 22779460

約数列:

[1, 2, 4, 5, 10, 20, 181, 362, 724, 905, 1810, 3620, 5659, 11318, 22636, 28295, 56590, 113180, 1024279, 2048558, 4097116, 5121395, 10242790, 20485580]

約数ペア:

[(1, 20485580), (2, 10242790), (4, 5121395), (5, 4097116), (10, 2048558), (20, 1024279), (181, 113180), (362, 56590), (724, 28295), (905, 22636), (1810, 11318), (3620, 5659)]