20407764640

素因数分解:

$2^5\times 5^1\times {\mathrm{1979}}^1\times {\mathrm{64451}}^1$

素因数の和:66445

約数の個数: 48

約数和(自身を含む): 48238454880

約数和(自身を除く): 27830690240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 1979, 3958, 7916, 9895, 15832, 19790, 31664, 39580, 63328, 64451, 79160, 128902, 158320, 257804, 316640, 322255, 515608, 644510, 1031216, 1289020, 2062432, 2578040, 5156080, 10312160, 127548529, 255097058, 510194116, 637742645, 1020388232, 1275485290, 2040776464, 2550970580, 4081552928, 5101941160, 10203882320, 20407764640]

約数ペア:

[(1, 20407764640), (2, 10203882320), (4, 5101941160), (5, 4081552928), (8, 2550970580), (10, 2040776464), (16, 1275485290), (20, 1020388232), (32, 637742645), (40, 510194116), (80, 255097058), (160, 127548529), (1979, 10312160), (3958, 5156080), (7916, 2578040), (9895, 2062432), (15832, 1289020), (19790, 1031216), (31664, 644510), (39580, 515608), (63328, 322255), (64451, 316640), (79160, 257804), (128902, 158320)]