78977540

素因数分解:

$2^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{21817}}^1$

素因数の和:22007

約数の個数: 24

約数和(自身を含む): 166776792

約数和(自身を除く): 87799252

約数列:

[1, 2, 4, 5, 10, 20, 181, 362, 724, 905, 1810, 3620, 21817, 43634, 87268, 109085, 218170, 436340, 3948877, 7897754, 15795508, 19744385, 39488770, 78977540]

約数ペア:

[(1, 78977540), (2, 39488770), (4, 19744385), (5, 15795508), (10, 7897754), (20, 3948877), (181, 436340), (362, 218170), (724, 109085), (905, 87268), (1810, 43634), (3620, 21817)]