81540180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{3259}}^1$

素因数の和:3413

約数の個数: 72

約数和(自身を含む): 249194400

約数和(自身を除く): 167654220

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 139, 180, 278, 417, 556, 695, 834, 1251, 1390, 1668, 2085, 2502, 2780, 3259, 4170, 5004, 6255, 6518, 8340, 9777, 12510, 13036, 16295, 19554, 25020, 29331, 32590, 39108, 48885, 58662, 65180, 97770, 117324, 146655, 195540, 293310, 453001, 586620, 906002, 1359003, 1812004, 2265005, 2718006, 4077009, 4530010, 5436012, 6795015, 8154018, 9060020, 13590030, 16308036, 20385045, 27180060, 40770090, 81540180]

約数ペア:

[(1, 81540180), (2, 40770090), (3, 27180060), (4, 20385045), (5, 16308036), (6, 13590030), (9, 9060020), (10, 8154018), (12, 6795015), (15, 5436012), (18, 4530010), (20, 4077009), (30, 2718006), (36, 2265005), (45, 1812004), (60, 1359003), (90, 906002), (139, 586620), (180, 453001), (278, 293310), (417, 195540), (556, 146655), (695, 117324), (834, 97770), (1251, 65180), (1390, 58662), (1668, 48885), (2085, 39108), (2502, 32590), (2780, 29331), (3259, 25020), (4170, 19554), (5004, 16295), (6255, 13036), (6518, 12510), (8340, 9777)]