8691920

素因数分解:

$2^4\times 5^1\times {\mathrm{108649}}^1$

素因数の和:108662

約数の個数: 20

約数和(自身を含む): 20208900

約数和(自身を除く): 11516980

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 108649, 217298, 434596, 543245, 869192, 1086490, 1738384, 2172980, 4345960, 8691920]

約数ペア:

[(1, 8691920), (2, 4345960), (4, 2172980), (5, 1738384), (8, 1086490), (10, 869192), (16, 543245), (20, 434596), (40, 217298), (80, 108649)]