64478180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{247993}}^1$

素因数の和:248015

約数の個数: 24

約数和(自身を含む): 145820472

約数和(自身を除く): 81342292

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 247993, 495986, 991972, 1239965, 2479930, 3223909, 4959860, 6447818, 12895636, 16119545, 32239090, 64478180]

約数ペア:

[(1, 64478180), (2, 32239090), (4, 16119545), (5, 12895636), (10, 6447818), (13, 4959860), (20, 3223909), (26, 2479930), (52, 1239965), (65, 991972), (130, 495986), (260, 247993)]