12661720

素因数分解:

$2^3\times 5^1\times {\mathrm{349}}^1\times {\mathrm{907}}^1$

素因数の和:1267

約数の個数: 32

約数和(自身を含む): 28602000

約数和(自身を除く): 15940280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 349, 698, 907, 1396, 1745, 1814, 2792, 3490, 3628, 4535, 6980, 7256, 9070, 13960, 18140, 36280, 316543, 633086, 1266172, 1582715, 2532344, 3165430, 6330860, 12661720]

約数ペア:

[(1, 12661720), (2, 6330860), (4, 3165430), (5, 2532344), (8, 1582715), (10, 1266172), (20, 633086), (40, 316543), (349, 36280), (698, 18140), (907, 13960), (1396, 9070), (1745, 7256), (1814, 6980), (2792, 4535), (3490, 3628)]