18664520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{191}}^1\times {\mathrm{349}}^1$

素因数の和:558

約数の個数: 64

約数和(自身を含む): 48384000

約数和(自身を除く): 29719480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 191, 280, 349, 382, 698, 764, 955, 1337, 1396, 1528, 1745, 1910, 2443, 2674, 2792, 3490, 3820, 4886, 5348, 6685, 6980, 7640, 9772, 10696, 12215, 13370, 13960, 19544, 24430, 26740, 48860, 53480, 66659, 97720, 133318, 266636, 333295, 466613, 533272, 666590, 933226, 1333180, 1866452, 2333065, 2666360, 3732904, 4666130, 9332260, 18664520]

約数ペア:

[(1, 18664520), (2, 9332260), (4, 4666130), (5, 3732904), (7, 2666360), (8, 2333065), (10, 1866452), (14, 1333180), (20, 933226), (28, 666590), (35, 533272), (40, 466613), (56, 333295), (70, 266636), (140, 133318), (191, 97720), (280, 66659), (349, 53480), (382, 48860), (698, 26740), (764, 24430), (955, 19544), (1337, 13960), (1396, 13370), (1528, 12215), (1745, 10696), (1910, 9772), (2443, 7640), (2674, 6980), (2792, 6685), (3490, 5348), (3820, 4886)]