78804280

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{9337}}^1$

素因数の和:9559

約数の個数: 32

約数和(自身を含む): 178169040

約数和(自身を除く): 99364760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1688, 2110, 4220, 8440, 9337, 18674, 37348, 46685, 74696, 93370, 186740, 373480, 1970107, 3940214, 7880428, 9850535, 15760856, 19701070, 39402140, 78804280]

約数ペア:

[(1, 78804280), (2, 39402140), (4, 19701070), (5, 15760856), (8, 9850535), (10, 7880428), (20, 3940214), (40, 1970107), (211, 373480), (422, 186740), (844, 93370), (1055, 74696), (1688, 46685), (2110, 37348), (4220, 18674), (8440, 9337)]