21403180

素因数分解:

$2^2\times 5^1\times {\mathrm{661}}^1\times {\mathrm{1619}}^1$

素因数の和:2289

約数の個数: 24

約数和(自身を含む): 45042480

約数和(自身を除く): 23639300

約数列:

[1, 2, 4, 5, 10, 20, 661, 1322, 1619, 2644, 3238, 3305, 6476, 6610, 8095, 13220, 16190, 32380, 1070159, 2140318, 4280636, 5350795, 10701590, 21403180]

約数ペア:

[(1, 21403180), (2, 10701590), (4, 5350795), (5, 4280636), (10, 2140318), (20, 1070159), (661, 32380), (1322, 16190), (1619, 13220), (2644, 8095), (3238, 6610), (3305, 6476)]