20408920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{72889}}^1$

素因数の和:72907

約数の個数: 32

約数和(自身を含む): 52480800

約数和(自身を除く): 32071880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 72889, 145778, 291556, 364445, 510223, 583112, 728890, 1020446, 1457780, 2040892, 2551115, 2915560, 4081784, 5102230, 10204460, 20408920]

約数ペア:

[(1, 20408920), (2, 10204460), (4, 5102230), (5, 4081784), (7, 2915560), (8, 2551115), (10, 2040892), (14, 1457780), (20, 1020446), (28, 728890), (35, 583112), (40, 510223), (56, 364445), (70, 291556), (140, 145778), (280, 72889)]