20492638720

素因数分解:

$2^9\times 5^1\times {\mathrm{127}}^1\times {\mathrm{63031}}^1$

素因数の和:63181

約数の個数: 80

約数和(自身を含む): 49521973248

約数和(自身を除く): 29029334528

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 128, 160, 254, 256, 320, 508, 512, 635, 640, 1016, 1270, 1280, 2032, 2540, 2560, 4064, 5080, 8128, 10160, 16256, 20320, 32512, 40640, 63031, 65024, 81280, 126062, 162560, 252124, 315155, 325120, 504248, 630310, 1008496, 1260620, 2016992, 2521240, 4033984, 5042480, 8004937, 8067968, 10084960, 16009874, 16135936, 20169920, 32019748, 32271872, 40024685, 40339840, 64039496, 80049370, 80679680, 128078992, 160098740, 161359360, 256157984, 320197480, 512315968, 640394960, 1024631936, 1280789920, 2049263872, 2561579840, 4098527744, 5123159680, 10246319360, 20492638720]

約数ペア:

[(1, 20492638720), (2, 10246319360), (4, 5123159680), (5, 4098527744), (8, 2561579840), (10, 2049263872), (16, 1280789920), (20, 1024631936), (32, 640394960), (40, 512315968), (64, 320197480), (80, 256157984), (127, 161359360), (128, 160098740), (160, 128078992), (254, 80679680), (256, 80049370), (320, 64039496), (508, 40339840), (512, 40024685), (635, 32271872), (640, 32019748), (1016, 20169920), (1270, 16135936), (1280, 16009874), (2032, 10084960), (2540, 8067968), (2560, 8004937), (4064, 5042480), (5080, 4033984), (8128, 2521240), (10160, 2016992), (16256, 1260620), (20320, 1008496), (32512, 630310), (40640, 504248), (63031, 325120), (65024, 315155), (81280, 252124), (126062, 162560)]