20675920

素因数分解:

$2^4\times 5^1\times {\mathrm{258449}}^1$

素因数の和:258462

約数の個数: 20

約数和(自身を含む): 48071700

約数和(自身を除く): 27395780

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 258449, 516898, 1033796, 1292245, 2067592, 2584490, 4135184, 5168980, 10337960, 20675920]

約数ペア:

[(1, 20675920), (2, 10337960), (4, 5168980), (5, 4135184), (8, 2584490), (10, 2067592), (16, 1292245), (20, 1033796), (40, 516898), (80, 258449)]