51414280

素因数分解:

$2^3\times 5^1\times {\mathrm{643}}^1\times {\mathrm{1999}}^1$

素因数の和:2653

約数の個数: 32

約数和(自身を含む): 115920000

約数和(自身を除く): 64505720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 643, 1286, 1999, 2572, 3215, 3998, 5144, 6430, 7996, 9995, 12860, 15992, 19990, 25720, 39980, 79960, 1285357, 2570714, 5141428, 6426785, 10282856, 12853570, 25707140, 51414280]

約数ペア:

[(1, 51414280), (2, 25707140), (4, 12853570), (5, 10282856), (8, 6426785), (10, 5141428), (20, 2570714), (40, 1285357), (643, 79960), (1286, 39980), (1999, 25720), (2572, 19990), (3215, 15992), (3998, 12860), (5144, 9995), (6430, 7996)]