21391708

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{411379}}^1$

素因数の和:411396

約数の個数: 12

約数和(自身を含む): 40315240

約数和(自身を除く): 18923532

約数列:

[1, 2, 4, 13, 26, 52, 411379, 822758, 1645516, 5347927, 10695854, 21391708]

約数ペア:

[(1, 21391708), (2, 10695854), (4, 5347927), (13, 1645516), (26, 822758), (52, 411379)]