20920960

素因数分解:

$2^7\times 5^1\times {\mathrm{97}}^1\times {\mathrm{337}}^1$

素因数の和:453

約数の個数: 64

約数和(自身を含む): 50679720

約数和(自身を除く): 29758760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 97, 128, 160, 194, 320, 337, 388, 485, 640, 674, 776, 970, 1348, 1552, 1685, 1940, 2696, 3104, 3370, 3880, 5392, 6208, 6740, 7760, 10784, 12416, 13480, 15520, 21568, 26960, 31040, 32689, 43136, 53920, 62080, 65378, 107840, 130756, 163445, 215680, 261512, 326890, 523024, 653780, 1046048, 1307560, 2092096, 2615120, 4184192, 5230240, 10460480, 20920960]

約数ペア:

[(1, 20920960), (2, 10460480), (4, 5230240), (5, 4184192), (8, 2615120), (10, 2092096), (16, 1307560), (20, 1046048), (32, 653780), (40, 523024), (64, 326890), (80, 261512), (97, 215680), (128, 163445), (160, 130756), (194, 107840), (320, 65378), (337, 62080), (388, 53920), (485, 43136), (640, 32689), (674, 31040), (776, 26960), (970, 21568), (1348, 15520), (1552, 13480), (1685, 12416), (1940, 10784), (2696, 7760), (3104, 6740), (3370, 6208), (3880, 5392)]