78870920

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{10009}}^1$

素因数の和:10217

約数の個数: 32

約数和(自身を含む): 178378200

約数和(自身を除く): 99507280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 3940, 7880, 10009, 20018, 40036, 50045, 80072, 100090, 200180, 400360, 1971773, 3943546, 7887092, 9858865, 15774184, 19717730, 39435460, 78870920]

約数ペア:

[(1, 78870920), (2, 39435460), (4, 19717730), (5, 15774184), (8, 9858865), (10, 7887092), (20, 3943546), (40, 1971773), (197, 400360), (394, 200180), (788, 100090), (985, 80072), (1576, 50045), (1970, 40036), (3940, 20018), (7880, 10009)]