18807820

素因数分解:

$2^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{4217}}^1$

素因数の和:4449

約数の個数: 24

約数和(自身を含む): 39682944

約数和(自身を除く): 20875124

約数列:

[1, 2, 4, 5, 10, 20, 223, 446, 892, 1115, 2230, 4217, 4460, 8434, 16868, 21085, 42170, 84340, 940391, 1880782, 3761564, 4701955, 9403910, 18807820]

約数ペア:

[(1, 18807820), (2, 9403910), (4, 4701955), (5, 3761564), (10, 1880782), (20, 940391), (223, 84340), (446, 42170), (892, 21085), (1115, 16868), (2230, 8434), (4217, 4460)]