21089919

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1$

素因数の和:231

約数の個数: 32

約数和(自身を含む): 30689280

約数和(自身を除く): 9599361

約数列:

[1, 3, 23, 53, 69, 73, 79, 159, 219, 237, 1219, 1679, 1817, 3657, 3869, 4187, 5037, 5451, 5767, 11607, 12561, 17301, 88987, 96301, 132641, 266961, 288903, 305651, 397923, 916953, 7029973, 21089919]

約数ペア:

[(1, 21089919), (3, 7029973), (23, 916953), (53, 397923), (69, 305651), (73, 288903), (79, 266961), (159, 132641), (219, 96301), (237, 88987), (1219, 17301), (1679, 12561), (1817, 11607), (3657, 5767), (3869, 5451), (4187, 5037)]