78941840

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{5009}}^1$

素因数の和:5219

約数の個数: 40

約数和(自身を含む): 184508280

約数和(自身を除く): 105566440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1576, 1970, 3152, 3940, 5009, 7880, 10018, 15760, 20036, 25045, 40072, 50090, 80144, 100180, 200360, 400720, 986773, 1973546, 3947092, 4933865, 7894184, 9867730, 15788368, 19735460, 39470920, 78941840]

約数ペア:

[(1, 78941840), (2, 39470920), (4, 19735460), (5, 15788368), (8, 9867730), (10, 7894184), (16, 4933865), (20, 3947092), (40, 1973546), (80, 986773), (197, 400720), (394, 200360), (788, 100180), (985, 80144), (1576, 50090), (1970, 40072), (3152, 25045), (3940, 20036), (5009, 15760), (7880, 10018)]