28988180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{111493}}^1$

素因数の和:111515

約数の個数: 24

約数和(自身を含む): 65558472

約数和(自身を除く): 36570292

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 111493, 222986, 445972, 557465, 1114930, 1449409, 2229860, 2898818, 5797636, 7247045, 14494090, 28988180]

約数ペア:

[(1, 28988180), (2, 14494090), (4, 7247045), (5, 5797636), (10, 2898818), (13, 2229860), (20, 1449409), (26, 1114930), (52, 557465), (65, 445972), (130, 222986), (260, 111493)]