81650680

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{49787}}^1$

素因数の和:49839

約数の個数: 32

約数和(自身を含む): 188198640

約数和(自身を除く): 106547960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 49787, 99574, 199148, 248935, 398296, 497870, 995740, 1991480, 2041267, 4082534, 8165068, 10206335, 16330136, 20412670, 40825340, 81650680]

約数ペア:

[(1, 81650680), (2, 40825340), (4, 20412670), (5, 16330136), (8, 10206335), (10, 8165068), (20, 4082534), (40, 2041267), (41, 1991480), (82, 995740), (164, 497870), (205, 398296), (328, 248935), (410, 199148), (820, 99574), (1640, 49787)]