81776656

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{393157}}^1$

素因数の和:393178

約数の個数: 20

約数和(自身を含む): 170630572

約数和(自身を除く): 88853916

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 393157, 786314, 1572628, 3145256, 5111041, 6290512, 10222082, 20444164, 40888328, 81776656]

約数ペア:

[(1, 81776656), (2, 40888328), (4, 20444164), (8, 10222082), (13, 6290512), (16, 5111041), (26, 3145256), (52, 1572628), (104, 786314), (208, 393157)]