18656890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{311}}^1\times {\mathrm{857}}^1$

素因数の和:1182

約数の個数: 32

約数和(自身を含む): 38548224

約数和(自身を除く): 19891334

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 311, 622, 857, 1555, 1714, 2177, 3110, 4285, 4354, 5999, 8570, 10885, 11998, 21770, 29995, 59990, 266527, 533054, 1332635, 1865689, 2665270, 3731378, 9328445, 18656890]

約数ペア:

[(1, 18656890), (2, 9328445), (5, 3731378), (7, 2665270), (10, 1865689), (14, 1332635), (35, 533054), (70, 266527), (311, 59990), (622, 29995), (857, 21770), (1555, 11998), (1714, 10885), (2177, 8570), (3110, 5999), (4285, 4354)]