51565040

素因数分解:

$2^4\times 5^1\times {\mathrm{644563}}^1$

素因数の和:644576

約数の個数: 20

約数和(自身を含む): 119888904

約数和(自身を除く): 68323864

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 644563, 1289126, 2578252, 3222815, 5156504, 6445630, 10313008, 12891260, 25782520, 51565040]

約数ペア:

[(1, 51565040), (2, 25782520), (4, 12891260), (5, 10313008), (8, 6445630), (10, 5156504), (16, 3222815), (20, 2578252), (40, 1289126), (80, 644563)]