81112525

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{277}}^1$

素因数の和:370

約数の個数: 48

約数和(自身を含む): 117273744

約数和(自身を除く): 36161219

約数列:

[1, 5, 13, 17, 25, 53, 65, 85, 221, 265, 277, 325, 425, 689, 901, 1105, 1325, 1385, 3445, 3601, 4505, 4709, 5525, 6925, 11713, 14681, 17225, 18005, 22525, 23545, 58565, 61217, 73405, 90025, 117725, 190853, 249577, 292825, 306085, 367025, 954265, 1247885, 1530425, 3244501, 4771325, 6239425, 16222505, 81112525]

約数ペア:

[(1, 81112525), (5, 16222505), (13, 6239425), (17, 4771325), (25, 3244501), (53, 1530425), (65, 1247885), (85, 954265), (221, 367025), (265, 306085), (277, 292825), (325, 249577), (425, 190853), (689, 117725), (901, 90025), (1105, 73405), (1325, 61217), (1385, 58565), (3445, 23545), (3601, 22525), (4505, 18005), (4709, 17225), (5525, 14681), (6925, 11713)]