18956740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{433}}^1$

素因数の和:652

約数の個数: 48

約数和(自身を含む): 43747200

約数和(自身を除く): 24790460

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 199, 220, 398, 433, 796, 866, 995, 1732, 1990, 2165, 2189, 3980, 4330, 4378, 4763, 8660, 8756, 9526, 10945, 19052, 21890, 23815, 43780, 47630, 86167, 95260, 172334, 344668, 430835, 861670, 947837, 1723340, 1895674, 3791348, 4739185, 9478370, 18956740]

約数ペア:

[(1, 18956740), (2, 9478370), (4, 4739185), (5, 3791348), (10, 1895674), (11, 1723340), (20, 947837), (22, 861670), (44, 430835), (55, 344668), (110, 172334), (199, 95260), (220, 86167), (398, 47630), (433, 43780), (796, 23815), (866, 21890), (995, 19052), (1732, 10945), (1990, 9526), (2165, 8756), (2189, 8660), (3980, 4763), (4330, 4378)]