20456780

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{60167}}^1$

素因数の和:60193

約数の個数: 24

約数和(自身を含む): 45487008

約数和(自身を除く): 25030228

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 60167, 120334, 240668, 300835, 601670, 1022839, 1203340, 2045678, 4091356, 5114195, 10228390, 20456780]

約数ペア:

[(1, 20456780), (2, 10228390), (4, 5114195), (5, 4091356), (10, 2045678), (17, 1203340), (20, 1022839), (34, 601670), (68, 300835), (85, 240668), (170, 120334), (340, 60167)]