20089640

素因数分解:

$2^3\times 5^1\times {\mathrm{359}}^1\times {\mathrm{1399}}^1$

素因数の和:1769

約数の個数: 32

約数和(自身を含む): 45360000

約数和(自身を除く): 25270360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 359, 718, 1399, 1436, 1795, 2798, 2872, 3590, 5596, 6995, 7180, 11192, 13990, 14360, 27980, 55960, 502241, 1004482, 2008964, 2511205, 4017928, 5022410, 10044820, 20089640]

約数ペア:

[(1, 20089640), (2, 10044820), (4, 5022410), (5, 4017928), (8, 2511205), (10, 2008964), (20, 1004482), (40, 502241), (359, 55960), (718, 27980), (1399, 14360), (1436, 13990), (1795, 11192), (2798, 7180), (2872, 6995), (3590, 5596)]