19815965

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{227}}^1$

素因数の和:341

約数の個数: 32

約数和(自身を含む): 27578880

約数和(自身を除く): 7762915

約数列:

[1, 5, 13, 17, 65, 79, 85, 221, 227, 395, 1027, 1105, 1135, 1343, 2951, 3859, 5135, 6715, 14755, 17459, 17933, 19295, 50167, 87295, 89665, 233129, 250835, 304861, 1165645, 1524305, 3963193, 19815965]

約数ペア:

[(1, 19815965), (5, 3963193), (13, 1524305), (17, 1165645), (65, 304861), (79, 250835), (85, 233129), (221, 89665), (227, 87295), (395, 50167), (1027, 19295), (1105, 17933), (1135, 17459), (1343, 14755), (2951, 6715), (3859, 5135)]