28325660

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{647}}^1$

素因数の和:866

約数の個数: 48

約数和(自身を含む): 65318400

約数和(自身を除く): 36992740

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 199, 220, 398, 647, 796, 995, 1294, 1990, 2189, 2588, 3235, 3980, 4378, 6470, 7117, 8756, 10945, 12940, 14234, 21890, 28468, 35585, 43780, 71170, 128753, 142340, 257506, 515012, 643765, 1287530, 1416283, 2575060, 2832566, 5665132, 7081415, 14162830, 28325660]

約数ペア:

[(1, 28325660), (2, 14162830), (4, 7081415), (5, 5665132), (10, 2832566), (11, 2575060), (20, 1416283), (22, 1287530), (44, 643765), (55, 515012), (110, 257506), (199, 142340), (220, 128753), (398, 71170), (647, 43780), (796, 35585), (995, 28468), (1294, 21890), (1990, 14234), (2189, 12940), (2588, 10945), (3235, 8756), (3980, 7117), (4378, 6470)]