128897275

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{1993}}^1$

素因数の和:2215

約数の個数: 24

約数和(自身を含む): 173079200

約数和(自身を除く): 44181925

約数列:

[1, 5, 13, 25, 65, 199, 325, 995, 1993, 2587, 4975, 9965, 12935, 25909, 49825, 64675, 129545, 396607, 647725, 1983035, 5155891, 9915175, 25779455, 128897275]

約数ペア:

[(1, 128897275), (5, 25779455), (13, 9915175), (25, 5155891), (65, 1983035), (199, 647725), (325, 396607), (995, 129545), (1993, 64675), (2587, 49825), (4975, 25909), (9965, 12935)]