20017580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{90989}}^1$

素因数の和:91009

約数の個数: 24

約数和(自身を含む): 45858960

約数和(自身を除く): 25841380

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 90989, 181978, 363956, 454945, 909890, 1000879, 1819780, 2001758, 4003516, 5004395, 10008790, 20017580]

約数ペア:

[(1, 20017580), (2, 10008790), (4, 5004395), (5, 4003516), (10, 2001758), (11, 1819780), (20, 1000879), (22, 909890), (44, 454945), (55, 363956), (110, 181978), (220, 90989)]