405720220

素因数分解:

$2^2\times 5^1\times {\mathrm{2039}}^1\times {\mathrm{9949}}^1$

素因数の和:11997

約数の個数: 24

約数和(自身を含む): 852516000

約数和(自身を除く): 446795780

約数列:

[1, 2, 4, 5, 10, 20, 2039, 4078, 8156, 9949, 10195, 19898, 20390, 39796, 40780, 49745, 99490, 198980, 20286011, 40572022, 81144044, 101430055, 202860110, 405720220]

約数ペア:

[(1, 405720220), (2, 202860110), (4, 101430055), (5, 81144044), (10, 40572022), (20, 20286011), (2039, 198980), (4078, 99490), (8156, 49745), (9949, 40780), (10195, 39796), (19898, 20390)]