21655953

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{397}}^1$

素因数の和:462

約数の個数: 48

約数和(自身を含む): 37252800

約数和(自身を除く): 15596847

約数列:

[1, 3, 9, 11, 19, 29, 33, 57, 87, 99, 171, 209, 261, 319, 397, 551, 627, 957, 1191, 1653, 1881, 2871, 3573, 4367, 4959, 6061, 7543, 11513, 13101, 18183, 22629, 34539, 39303, 54549, 67887, 82973, 103617, 126643, 218747, 248919, 379929, 656241, 746757, 1139787, 1968723, 2406217, 7218651, 21655953]

約数ペア:

[(1, 21655953), (3, 7218651), (9, 2406217), (11, 1968723), (19, 1139787), (29, 746757), (33, 656241), (57, 379929), (87, 248919), (99, 218747), (171, 126643), (209, 103617), (261, 82973), (319, 67887), (397, 54549), (551, 39303), (627, 34539), (957, 22629), (1191, 18183), (1653, 13101), (1881, 11513), (2871, 7543), (3573, 6061), (4367, 4959)]