51513520

素因数分解:

$2^4\times 5^1\times {\mathrm{643919}}^1$

素因数の和:643932

約数の個数: 20

約数和(自身を含む): 119769120

約数和(自身を除く): 68255600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 643919, 1287838, 2575676, 3219595, 5151352, 6439190, 10302704, 12878380, 25756760, 51513520]

約数ペア:

[(1, 51513520), (2, 25756760), (4, 12878380), (5, 10302704), (8, 6439190), (10, 5151352), (16, 3219595), (20, 2575676), (40, 1287838), (80, 643919)]