20315920

素因数分解:

$2^4\times 5^1\times {\mathrm{253949}}^1$

素因数の和:253962

約数の個数: 20

約数和(自身を含む): 47234700

約数和(自身を除く): 26918780

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 253949, 507898, 1015796, 1269745, 2031592, 2539490, 4063184, 5078980, 10157960, 20315920]

約数ペア:

[(1, 20315920), (2, 10157960), (4, 5078980), (5, 4063184), (8, 2539490), (10, 2031592), (16, 1269745), (20, 1015796), (40, 507898), (80, 253949)]