81187515

素因数分解:

$3^5\times 5^1\times {\mathrm{66821}}^1$

素因数の和:66841

約数の個数: 24

約数和(自身を含む): 145939248

約数和(自身を除く): 64751733

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 66821, 200463, 334105, 601389, 1002315, 1804167, 3006945, 5412501, 9020835, 16237503, 27062505, 81187515]

約数ペア:

[(1, 81187515), (3, 27062505), (5, 16237503), (9, 9020835), (15, 5412501), (27, 3006945), (45, 1804167), (81, 1002315), (135, 601389), (243, 334105), (405, 200463), (1215, 66821)]