1320782920

素因数分解:

$2^3\times 5^1\times {\mathrm{1789}}^1\times {\mathrm{18457}}^1$

素因数の和:20257

約数の個数: 32

約数和(自身を含む): 2973583800

約数和(自身を除く): 1652800880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1789, 3578, 7156, 8945, 14312, 17890, 18457, 35780, 36914, 71560, 73828, 92285, 147656, 184570, 369140, 738280, 33019573, 66039146, 132078292, 165097865, 264156584, 330195730, 660391460, 1320782920]

約数ペア:

[(1, 1320782920), (2, 660391460), (4, 330195730), (5, 264156584), (8, 165097865), (10, 132078292), (20, 66039146), (40, 33019573), (1789, 738280), (3578, 369140), (7156, 184570), (8945, 147656), (14312, 92285), (17890, 73828), (18457, 71560), (35780, 36914)]