19725380

素因数分解:

$2^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{5449}}^1$

素因数の和:5639

約数の個数: 24

約数和(自身を含む): 41659800

約数和(自身を除く): 21934420

約数列:

[1, 2, 4, 5, 10, 20, 181, 362, 724, 905, 1810, 3620, 5449, 10898, 21796, 27245, 54490, 108980, 986269, 1972538, 3945076, 4931345, 9862690, 19725380]

約数ペア:

[(1, 19725380), (2, 9862690), (4, 4931345), (5, 3945076), (10, 1972538), (20, 986269), (181, 108980), (362, 54490), (724, 27245), (905, 21796), (1810, 10898), (3620, 5449)]