66688180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{256493}}^1$

素因数の和:256515

約数の個数: 24

約数和(自身を含む): 150818472

約数和(自身を除く): 84130292

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 256493, 512986, 1025972, 1282465, 2564930, 3334409, 5129860, 6668818, 13337636, 16672045, 33344090, 66688180]

約数ペア:

[(1, 66688180), (2, 33344090), (4, 16672045), (5, 13337636), (10, 6668818), (13, 5129860), (20, 3334409), (26, 2564930), (52, 1282465), (65, 1025972), (130, 512986), (260, 256493)]