18972820

素因数分解:

$2^2\times 5^1\times {\mathrm{263}}^1\times {\mathrm{3607}}^1$

素因数の和:3879

約数の個数: 24

約数和(自身を含む): 40005504

約数和(自身を除く): 21032684

約数列:

[1, 2, 4, 5, 10, 20, 263, 526, 1052, 1315, 2630, 3607, 5260, 7214, 14428, 18035, 36070, 72140, 948641, 1897282, 3794564, 4743205, 9486410, 18972820]

約数ペア:

[(1, 18972820), (2, 9486410), (4, 4743205), (5, 3794564), (10, 1897282), (20, 948641), (263, 72140), (526, 36070), (1052, 18035), (1315, 14428), (2630, 7214), (3607, 5260)]