81085960

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47143}}^1$

素因数の和:47197

約数の個数: 32

約数和(自身を含む): 186690240

約数和(自身を除く): 105604280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 47143, 94286, 188572, 235715, 377144, 471430, 942860, 1885720, 2027149, 4054298, 8108596, 10135745, 16217192, 20271490, 40542980, 81085960]

約数ペア:

[(1, 81085960), (2, 40542980), (4, 20271490), (5, 16217192), (8, 10135745), (10, 8108596), (20, 4054298), (40, 2027149), (43, 1885720), (86, 942860), (172, 471430), (215, 377144), (344, 235715), (430, 188572), (860, 94286), (1720, 47143)]