20457945

素因数分解:

$3^2\times 5^1\times {\mathrm{383}}^1\times {\mathrm{1187}}^1$

素因数の和:1581

約数の個数: 24

約数和(自身を含む): 35582976

約数和(自身を除く): 15125031

約数列:

[1, 3, 5, 9, 15, 45, 383, 1149, 1187, 1915, 3447, 3561, 5745, 5935, 10683, 17235, 17805, 53415, 454621, 1363863, 2273105, 4091589, 6819315, 20457945]

約数ペア:

[(1, 20457945), (3, 6819315), (5, 4091589), (9, 2273105), (15, 1363863), (45, 454621), (383, 53415), (1149, 17805), (1187, 17235), (1915, 10683), (3447, 5935), (3561, 5745)]