18784953

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{727}}^1$

素因数の和:779

約数の個数: 40

約数和(自身を含む): 31711680

約数和(自身を除く): 12926727

約数列:

[1, 3, 9, 11, 27, 29, 33, 81, 87, 99, 261, 297, 319, 727, 783, 891, 957, 2181, 2349, 2871, 6543, 7997, 8613, 19629, 21083, 23991, 25839, 58887, 63249, 71973, 189747, 215919, 231913, 569241, 647757, 695739, 1707723, 2087217, 6261651, 18784953]

約数ペア:

[(1, 18784953), (3, 6261651), (9, 2087217), (11, 1707723), (27, 695739), (29, 647757), (33, 569241), (81, 231913), (87, 215919), (99, 189747), (261, 71973), (297, 63249), (319, 58887), (727, 25839), (783, 23991), (891, 21083), (957, 19629), (2181, 8613), (2349, 7997), (2871, 6543)]