81350120

素因数分解:

$2^3\times 5^1\times {\mathrm{1123}}^1\times {\mathrm{1811}}^1$

素因数の和:2945

約数の個数: 32

約数和(自身を含む): 183301920

約数和(自身を除く): 101951800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1123, 1811, 2246, 3622, 4492, 5615, 7244, 8984, 9055, 11230, 14488, 18110, 22460, 36220, 44920, 72440, 2033753, 4067506, 8135012, 10168765, 16270024, 20337530, 40675060, 81350120]

約数ペア:

[(1, 81350120), (2, 40675060), (4, 20337530), (5, 16270024), (8, 10168765), (10, 8135012), (20, 4067506), (40, 2033753), (1123, 72440), (1811, 44920), (2246, 36220), (3622, 22460), (4492, 18110), (5615, 14488), (7244, 11230), (8984, 9055)]