81893968

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{393721}}^1$

素因数の和:393742

約数の個数: 20

約数和(自身を含む): 170875348

約数和(自身を除く): 88981380

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 393721, 787442, 1574884, 3149768, 5118373, 6299536, 10236746, 20473492, 40946984, 81893968]

約数ペア:

[(1, 81893968), (2, 40946984), (4, 20473492), (8, 10236746), (13, 6299536), (16, 5118373), (26, 3149768), (52, 1574884), (104, 787442), (208, 393721)]