81665104

素因数分解:

$2^4\times {\mathrm{389}}^1\times {\mathrm{13121}}^1$

素因数の和:13518

約数の個数: 20

約数和(自身を含む): 158644980

約数和(自身を除く): 76979876

約数列:

[1, 2, 4, 8, 16, 389, 778, 1556, 3112, 6224, 13121, 26242, 52484, 104968, 209936, 5104069, 10208138, 20416276, 40832552, 81665104]

約数ペア:

[(1, 81665104), (2, 40832552), (4, 20416276), (8, 10208138), (16, 5104069), (389, 209936), (778, 104968), (1556, 52484), (3112, 26242), (6224, 13121)]