20538128

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{293}}^1\times {\mathrm{337}}^1$

素因数の和:651

約数の個数: 40

約数和(自身を含む): 43127448

約数和(自身を除く): 22589320

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 293, 337, 586, 674, 1172, 1348, 2344, 2696, 3809, 4381, 4688, 5392, 7618, 8762, 15236, 17524, 30472, 35048, 60944, 70096, 98741, 197482, 394964, 789928, 1283633, 1579856, 2567266, 5134532, 10269064, 20538128]

約数ペア:

[(1, 20538128), (2, 10269064), (4, 5134532), (8, 2567266), (13, 1579856), (16, 1283633), (26, 789928), (52, 394964), (104, 197482), (208, 98741), (293, 70096), (337, 60944), (586, 35048), (674, 30472), (1172, 17524), (1348, 15236), (2344, 8762), (2696, 7618), (3809, 5392), (4381, 4688)]