8991385

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{103}}^1$

素因数の和:217

約数の個数: 32

約数和(自身を含む): 12579840

約数和(自身を除く): 3588455

約数列:

[1, 5, 13, 17, 65, 79, 85, 103, 221, 395, 515, 1027, 1105, 1339, 1343, 1751, 5135, 6695, 6715, 8137, 8755, 17459, 22763, 40685, 87295, 105781, 113815, 138329, 528905, 691645, 1798277, 8991385]

約数ペア:

[(1, 8991385), (5, 1798277), (13, 691645), (17, 528905), (65, 138329), (79, 113815), (85, 105781), (103, 87295), (221, 40685), (395, 22763), (515, 17459), (1027, 8755), (1105, 8137), (1339, 6715), (1343, 6695), (1751, 5135)]