80996980

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{199}}^1\times {\mathrm{433}}^1$

素因数の和:688

約数の個数: 48

約数和(自身を含む): 174988800

約数和(自身を除く): 93991820

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 199, 235, 398, 433, 470, 796, 866, 940, 995, 1732, 1990, 2165, 3980, 4330, 8660, 9353, 18706, 20351, 37412, 40702, 46765, 81404, 86167, 93530, 101755, 172334, 187060, 203510, 344668, 407020, 430835, 861670, 1723340, 4049849, 8099698, 16199396, 20249245, 40498490, 80996980]

約数ペア:

[(1, 80996980), (2, 40498490), (4, 20249245), (5, 16199396), (10, 8099698), (20, 4049849), (47, 1723340), (94, 861670), (188, 430835), (199, 407020), (235, 344668), (398, 203510), (433, 187060), (470, 172334), (796, 101755), (866, 93530), (940, 86167), (995, 81404), (1732, 46765), (1990, 40702), (2165, 37412), (3980, 20351), (4330, 18706), (8660, 9353)]