1991110

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{787}}^1$

素因数の和:828

約数の個数: 32

約数和(自身を含む): 4084992

約数和(自身を除く): 2093882

約数列:

[1, 2, 5, 10, 11, 22, 23, 46, 55, 110, 115, 230, 253, 506, 787, 1265, 1574, 2530, 3935, 7870, 8657, 17314, 18101, 36202, 43285, 86570, 90505, 181010, 199111, 398222, 995555, 1991110]

約数ペア:

[(1, 1991110), (2, 995555), (5, 398222), (10, 199111), (11, 181010), (22, 90505), (23, 86570), (46, 43285), (55, 36202), (110, 18101), (115, 17314), (230, 8657), (253, 7870), (506, 3935), (787, 2530), (1265, 1574)]