20807560

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{3797}}^1$

素因数の和:3945

約数の個数: 32

約数和(自身を含む): 47171160

約数和(自身を除く): 26363600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 3797, 5480, 7594, 15188, 18985, 30376, 37970, 75940, 151880, 520189, 1040378, 2080756, 2600945, 4161512, 5201890, 10403780, 20807560]

約数ペア:

[(1, 20807560), (2, 10403780), (4, 5201890), (5, 4161512), (8, 2600945), (10, 2080756), (20, 1040378), (40, 520189), (137, 151880), (274, 75940), (548, 37970), (685, 30376), (1096, 18985), (1370, 15188), (2740, 7594), (3797, 5480)]