256156780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{5851}}^1$

素因数の和:6070

約数の個数: 48

約数和(自身を含む): 589881600

約数和(自身を除く): 333724820

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 199, 220, 398, 796, 995, 1990, 2189, 3980, 4378, 5851, 8756, 10945, 11702, 21890, 23404, 29255, 43780, 58510, 64361, 117020, 128722, 257444, 321805, 643610, 1164349, 1287220, 2328698, 4657396, 5821745, 11643490, 12807839, 23286980, 25615678, 51231356, 64039195, 128078390, 256156780]

約数ペア:

[(1, 256156780), (2, 128078390), (4, 64039195), (5, 51231356), (10, 25615678), (11, 23286980), (20, 12807839), (22, 11643490), (44, 5821745), (55, 4657396), (110, 2328698), (199, 1287220), (220, 1164349), (398, 643610), (796, 321805), (995, 257444), (1990, 128722), (2189, 117020), (3980, 64361), (4378, 58510), (5851, 43780), (8756, 29255), (10945, 23404), (11702, 21890)]