81159728

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{390191}}^1$

素因数の和:390212

約数の個数: 20

約数和(自身を含む): 169343328

約数和(自身を除く): 88183600

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 390191, 780382, 1560764, 3121528, 5072483, 6243056, 10144966, 20289932, 40579864, 81159728]

約数ペア:

[(1, 81159728), (2, 40579864), (4, 20289932), (8, 10144966), (13, 6243056), (16, 5072483), (26, 3121528), (52, 1560764), (104, 780382), (208, 390191)]