39720400

素因数分解:

$2^4\times 5^2\times {\mathrm{199}}^1\times {\mathrm{499}}^1$

素因数の和:716

約数の個数: 60

約数和(自身を含む): 96100000

約数和(自身を除く): 56379600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 199, 200, 398, 400, 499, 796, 995, 998, 1592, 1990, 1996, 2495, 3184, 3980, 3992, 4975, 4990, 7960, 7984, 9950, 9980, 12475, 15920, 19900, 19960, 24950, 39800, 39920, 49900, 79600, 99301, 99800, 198602, 199600, 397204, 496505, 794408, 993010, 1588816, 1986020, 2482525, 3972040, 4965050, 7944080, 9930100, 19860200, 39720400]

約数ペア:

[(1, 39720400), (2, 19860200), (4, 9930100), (5, 7944080), (8, 4965050), (10, 3972040), (16, 2482525), (20, 1986020), (25, 1588816), (40, 993010), (50, 794408), (80, 496505), (100, 397204), (199, 199600), (200, 198602), (398, 99800), (400, 99301), (499, 79600), (796, 49900), (995, 39920), (998, 39800), (1592, 24950), (1990, 19960), (1996, 19900), (2495, 15920), (3184, 12475), (3980, 9980), (3992, 9950), (4975, 7984), (4990, 7960)]