18948979

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{199}}^1\times {\mathrm{223}}^1$

素因数の和:490

約数の個数: 16

約数和(自身を含む): 22220800

約数和(自身を除く): 3271821

約数列:

[1, 7, 61, 199, 223, 427, 1393, 1561, 12139, 13603, 44377, 84973, 95221, 310639, 2706997, 18948979]

約数ペア:

[(1, 18948979), (7, 2706997), (61, 310639), (199, 95221), (223, 84973), (427, 44377), (1393, 13603), (1561, 12139)]