81269968

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{390721}}^1$

素因数の和:390742

約数の個数: 20

約数和(自身を含む): 169573348

約数和(自身を除く): 88303380

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 390721, 781442, 1562884, 3125768, 5079373, 6251536, 10158746, 20317492, 40634984, 81269968]

約数ペア:

[(1, 81269968), (2, 40634984), (4, 20317492), (8, 10158746), (13, 6251536), (16, 5079373), (26, 3125768), (52, 1562884), (104, 781442), (208, 390721)]