20970620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{479}}^1$

素因数の和:698

約数の個数: 48

約数和(自身を含む): 48384000

約数和(自身を除く): 27413380

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 199, 220, 398, 479, 796, 958, 995, 1916, 1990, 2189, 2395, 3980, 4378, 4790, 5269, 8756, 9580, 10538, 10945, 21076, 21890, 26345, 43780, 52690, 95321, 105380, 190642, 381284, 476605, 953210, 1048531, 1906420, 2097062, 4194124, 5242655, 10485310, 20970620]

約数ペア:

[(1, 20970620), (2, 10485310), (4, 5242655), (5, 4194124), (10, 2097062), (11, 1906420), (20, 1048531), (22, 953210), (44, 476605), (55, 381284), (110, 190642), (199, 105380), (220, 95321), (398, 52690), (479, 43780), (796, 26345), (958, 21890), (995, 21076), (1916, 10945), (1990, 10538), (2189, 9580), (2395, 8756), (3980, 5269), (4378, 4790)]