2805740

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{409}}^1$

素因数の和:439

約数の個数: 48

約数和(自身を含む): 6888000

約数和(自身を除く): 4082260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 343, 409, 490, 686, 818, 980, 1372, 1636, 1715, 2045, 2863, 3430, 4090, 5726, 6860, 8180, 11452, 14315, 20041, 28630, 40082, 57260, 80164, 100205, 140287, 200410, 280574, 400820, 561148, 701435, 1402870, 2805740]

約数ペア:

[(1, 2805740), (2, 1402870), (4, 701435), (5, 561148), (7, 400820), (10, 280574), (14, 200410), (20, 140287), (28, 100205), (35, 80164), (49, 57260), (70, 40082), (98, 28630), (140, 20041), (196, 14315), (245, 11452), (343, 8180), (409, 6860), (490, 5726), (686, 4090), (818, 3430), (980, 2863), (1372, 2045), (1636, 1715)]