2780428

素因数分解:

$2^2\times 7^1\times {\mathrm{199}}^1\times {\mathrm{499}}^1$

素因数の和:709

約数の個数: 24

約数和(自身を含む): 5600000

約数和(自身を除く): 2819572

約数列:

[1, 2, 4, 7, 14, 28, 199, 398, 499, 796, 998, 1393, 1996, 2786, 3493, 5572, 6986, 13972, 99301, 198602, 397204, 695107, 1390214, 2780428]

約数ペア:

[(1, 2780428), (2, 1390214), (4, 695107), (7, 397204), (14, 198602), (28, 99301), (199, 13972), (398, 6986), (499, 5572), (796, 3493), (998, 2786), (1393, 1996)]