20398420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{145703}}^1$

素因数の和:145719

約数の個数: 24

約数和(自身を含む): 48956544

約数和(自身を除く): 28558124

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 145703, 291406, 582812, 728515, 1019921, 1457030, 2039842, 2914060, 4079684, 5099605, 10199210, 20398420]

約数ペア:

[(1, 20398420), (2, 10199210), (4, 5099605), (5, 4079684), (7, 2914060), (10, 2039842), (14, 1457030), (20, 1019921), (28, 728515), (35, 582812), (70, 291406), (140, 145703)]