20921920

素因数分解:

$2^6\times 5^1\times {\mathrm{65381}}^1$

素因数の和:65398

約数の個数: 28

約数和(自身を含む): 49821084

約数和(自身を除く): 28899164

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 65381, 130762, 261524, 326905, 523048, 653810, 1046096, 1307620, 2092192, 2615240, 4184384, 5230480, 10460960, 20921920]

約数ペア:

[(1, 20921920), (2, 10460960), (4, 5230480), (5, 4184384), (8, 2615240), (10, 2092192), (16, 1307620), (20, 1046096), (32, 653810), (40, 523048), (64, 326905), (80, 261524), (160, 130762), (320, 65381)]