640840

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{433}}^1$

素因数の和:481

約数の個数: 32

約数和(自身を含む): 1484280

約数和(自身を除く): 843440

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 433, 740, 866, 1480, 1732, 2165, 3464, 4330, 8660, 16021, 17320, 32042, 64084, 80105, 128168, 160210, 320420, 640840]

約数ペア:

[(1, 640840), (2, 320420), (4, 160210), (5, 128168), (8, 80105), (10, 64084), (20, 32042), (37, 17320), (40, 16021), (74, 8660), (148, 4330), (185, 3464), (296, 2165), (370, 1732), (433, 1480), (740, 866)]