161587280

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{10253}}^1$

素因数の和:10463

約数の個数: 40

約数和(自身を含む): 377634312

約数和(自身を除く): 216047032

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1576, 1970, 3152, 3940, 7880, 10253, 15760, 20506, 41012, 51265, 82024, 102530, 164048, 205060, 410120, 820240, 2019841, 4039682, 8079364, 10099205, 16158728, 20198410, 32317456, 40396820, 80793640, 161587280]

約数ペア:

[(1, 161587280), (2, 80793640), (4, 40396820), (5, 32317456), (8, 20198410), (10, 16158728), (16, 10099205), (20, 8079364), (40, 4039682), (80, 2019841), (197, 820240), (394, 410120), (788, 205060), (985, 164048), (1576, 102530), (1970, 82024), (3152, 51265), (3940, 41012), (7880, 20506), (10253, 15760)]