18667971

素因数分解:

$3^2\times 7^2\times {\mathrm{42331}}^1$

素因数の和:42351

約数の個数: 18

約数和(自身を含む): 31368012

約数和(自身を除く): 12700041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 42331, 126993, 296317, 380979, 888951, 2074219, 2666853, 6222657, 18667971]

約数ペア:

[(1, 18667971), (3, 6222657), (7, 2666853), (9, 2074219), (21, 888951), (49, 380979), (63, 296317), (147, 126993), (441, 42331)]