19813885

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{6221}}^1$

素因数の和:6253

約数の個数: 24

約数和(自身を含む): 29790936

約数和(自身を除く): 9977051

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637, 3185, 6221, 31105, 43547, 80873, 217735, 304829, 404365, 566111, 1524145, 2830555, 3962777, 19813885]

約数ペア:

[(1, 19813885), (5, 3962777), (7, 2830555), (13, 1524145), (35, 566111), (49, 404365), (65, 304829), (91, 217735), (245, 80873), (455, 43547), (637, 31105), (3185, 6221)]