21783680

素因数分解:

$2^7\times 5^1\times {\mathrm{101}}^1\times {\mathrm{337}}^1$

素因数の和:457

約数の個数: 64

約数和(自身を含む): 52748280

約数和(自身を除く): 30964600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 101, 128, 160, 202, 320, 337, 404, 505, 640, 674, 808, 1010, 1348, 1616, 1685, 2020, 2696, 3232, 3370, 4040, 5392, 6464, 6740, 8080, 10784, 12928, 13480, 16160, 21568, 26960, 32320, 34037, 43136, 53920, 64640, 68074, 107840, 136148, 170185, 215680, 272296, 340370, 544592, 680740, 1089184, 1361480, 2178368, 2722960, 4356736, 5445920, 10891840, 21783680]

約数ペア:

[(1, 21783680), (2, 10891840), (4, 5445920), (5, 4356736), (8, 2722960), (10, 2178368), (16, 1361480), (20, 1089184), (32, 680740), (40, 544592), (64, 340370), (80, 272296), (101, 215680), (128, 170185), (160, 136148), (202, 107840), (320, 68074), (337, 64640), (404, 53920), (505, 43136), (640, 34037), (674, 32320), (808, 26960), (1010, 21568), (1348, 16160), (1616, 13480), (1685, 12928), (2020, 10784), (2696, 8080), (3232, 6740), (3370, 6464), (4040, 5392)]