20581640

素因数分解:

$2^3\times 5^1\times {\mathrm{599}}^1\times {\mathrm{859}}^1$

素因数の和:1469

約数の個数: 32

約数和(自身を含む): 46440000

約数和(自身を除く): 25858360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 599, 859, 1198, 1718, 2396, 2995, 3436, 4295, 4792, 5990, 6872, 8590, 11980, 17180, 23960, 34360, 514541, 1029082, 2058164, 2572705, 4116328, 5145410, 10290820, 20581640]

約数ペア:

[(1, 20581640), (2, 10290820), (4, 5145410), (5, 4116328), (8, 2572705), (10, 2058164), (20, 1029082), (40, 514541), (599, 34360), (859, 23960), (1198, 17180), (1718, 11980), (2396, 8590), (2995, 6872), (3436, 5990), (4295, 4792)]