20156885

素因数分解:

$5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{2837}}^1$

素因数の和:2885

約数の個数: 24

約数和(自身を含む): 29117880

約数和(自身を除く): 8960995

約数列:

[1, 5, 7, 29, 35, 49, 145, 203, 245, 1015, 1421, 2837, 7105, 14185, 19859, 82273, 99295, 139013, 411365, 575911, 695065, 2879555, 4031377, 20156885]

約数ペア:

[(1, 20156885), (5, 4031377), (7, 2879555), (29, 695065), (35, 575911), (49, 411365), (145, 139013), (203, 99295), (245, 82273), (1015, 19859), (1421, 14185), (2837, 7105)]