21995180

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{13921}}^1$

素因数の和:14009

約数の個数: 24

約数和(自身を含む): 46777920

約数和(自身を除く): 24782740

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 13921, 27842, 55684, 69605, 139210, 278420, 1099759, 2199518, 4399036, 5498795, 10997590, 21995180]

約数ペア:

[(1, 21995180), (2, 10997590), (4, 5498795), (5, 4399036), (10, 2199518), (20, 1099759), (79, 278420), (158, 139210), (316, 69605), (395, 55684), (790, 27842), (1580, 13921)]