20639600

素因数分解:

$2^4\times 5^2\times {\mathrm{51599}}^1$

素因数の和:51617

約数の個数: 30

約数和(自身を含む): 49587600

約数和(自身を除く): 28948000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 51599, 103198, 206396, 257995, 412792, 515990, 825584, 1031980, 1289975, 2063960, 2579950, 4127920, 5159900, 10319800, 20639600]

約数ペア:

[(1, 20639600), (2, 10319800), (4, 5159900), (5, 4127920), (8, 2579950), (10, 2063960), (16, 1289975), (20, 1031980), (25, 825584), (40, 515990), (50, 412792), (80, 257995), (100, 206396), (200, 103198), (400, 51599)]