81169985

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{29}}^1\times {\mathrm{149}}^1$

素因数の和:230

約数の個数: 48

約数和(自身を含む): 116046000

約数和(自身を除く): 34876015

約数列:

[1, 5, 13, 17, 29, 65, 85, 145, 149, 221, 289, 377, 493, 745, 1105, 1445, 1885, 1937, 2465, 2533, 3757, 4321, 6409, 8381, 9685, 12665, 18785, 21605, 32045, 32929, 41905, 43061, 56173, 73457, 108953, 164645, 215305, 280865, 367285, 544765, 559793, 954941, 1248769, 2798965, 4774705, 6243845, 16233997, 81169985]

約数ペア:

[(1, 81169985), (5, 16233997), (13, 6243845), (17, 4774705), (29, 2798965), (65, 1248769), (85, 954941), (145, 559793), (149, 544765), (221, 367285), (289, 280865), (377, 215305), (493, 164645), (745, 108953), (1105, 73457), (1445, 56173), (1885, 43061), (1937, 41905), (2465, 32929), (2533, 32045), (3757, 21605), (4321, 18785), (6409, 12665), (8381, 9685)]