21102939

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{863}}^1$

素因数の和:912

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 16636581

約数列:

[1, 3, 9, 11, 13, 19, 33, 39, 57, 99, 117, 143, 171, 209, 247, 429, 627, 741, 863, 1287, 1881, 2223, 2589, 2717, 7767, 8151, 9493, 11219, 16397, 24453, 28479, 33657, 49191, 85437, 100971, 123409, 147573, 180367, 213161, 370227, 541101, 639483, 1110681, 1623303, 1918449, 2344771, 7034313, 21102939]

約数ペア:

[(1, 21102939), (3, 7034313), (9, 2344771), (11, 1918449), (13, 1623303), (19, 1110681), (33, 639483), (39, 541101), (57, 370227), (99, 213161), (117, 180367), (143, 147573), (171, 123409), (209, 100971), (247, 85437), (429, 49191), (627, 33657), (741, 28479), (863, 24453), (1287, 16397), (1881, 11219), (2223, 9493), (2589, 8151), (2717, 7767)]