20577220

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{337}}^1$

素因数の和:460

約数の個数: 48

約数和(自身を含む): 44972928

約数和(自身を除く): 24395708

約数列:

[1, 2, 4, 5, 10, 20, 43, 71, 86, 142, 172, 215, 284, 337, 355, 430, 674, 710, 860, 1348, 1420, 1685, 3053, 3370, 6106, 6740, 12212, 14491, 15265, 23927, 28982, 30530, 47854, 57964, 61060, 72455, 95708, 119635, 144910, 239270, 289820, 478540, 1028861, 2057722, 4115444, 5144305, 10288610, 20577220]

約数ペア:

[(1, 20577220), (2, 10288610), (4, 5144305), (5, 4115444), (10, 2057722), (20, 1028861), (43, 478540), (71, 289820), (86, 239270), (142, 144910), (172, 119635), (215, 95708), (284, 72455), (337, 61060), (355, 57964), (430, 47854), (674, 30530), (710, 28982), (860, 23927), (1348, 15265), (1420, 14491), (1685, 12212), (3053, 6740), (3370, 6106)]