20378560

素因数分解:

$2^6\times 5^1\times {\mathrm{43}}^1\times {\mathrm{1481}}^1$

素因数の和:1541

約数の個数: 56

約数和(自身を含む): 49688496

約数和(自身を除く): 29309936

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 64, 80, 86, 160, 172, 215, 320, 344, 430, 688, 860, 1376, 1481, 1720, 2752, 2962, 3440, 5924, 6880, 7405, 11848, 13760, 14810, 23696, 29620, 47392, 59240, 63683, 94784, 118480, 127366, 236960, 254732, 318415, 473920, 509464, 636830, 1018928, 1273660, 2037856, 2547320, 4075712, 5094640, 10189280, 20378560]

約数ペア:

[(1, 20378560), (2, 10189280), (4, 5094640), (5, 4075712), (8, 2547320), (10, 2037856), (16, 1273660), (20, 1018928), (32, 636830), (40, 509464), (43, 473920), (64, 318415), (80, 254732), (86, 236960), (160, 127366), (172, 118480), (215, 94784), (320, 63683), (344, 59240), (430, 47392), (688, 29620), (860, 23696), (1376, 14810), (1481, 13760), (1720, 11848), (2752, 7405), (2962, 6880), (3440, 5924)]