18986967

素因数分解:

$3^4\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{137}}^1$

素因数の和:237

約数の個数: 40

約数和(自身を含む): 30056400

約数和(自身を除く): 11069433

約数列:

[1, 3, 9, 27, 29, 59, 81, 87, 137, 177, 261, 411, 531, 783, 1233, 1593, 1711, 2349, 3699, 3973, 4779, 5133, 8083, 11097, 11919, 15399, 24249, 35757, 46197, 72747, 107271, 138591, 218241, 234407, 321813, 654723, 703221, 2109663, 6328989, 18986967]

約数ペア:

[(1, 18986967), (3, 6328989), (9, 2109663), (27, 703221), (29, 654723), (59, 321813), (81, 234407), (87, 218241), (137, 138591), (177, 107271), (261, 72747), (411, 46197), (531, 35757), (783, 24249), (1233, 15399), (1593, 11919), (1711, 11097), (2349, 8083), (3699, 5133), (3973, 4779)]