18917678

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{16921}}^1$

素因数の和:16979

約数の個数: 16

約数和(自身を含む): 31271856

約数和(自身を除く): 12354178

約数列:

[1, 2, 13, 26, 43, 86, 559, 1118, 16921, 33842, 219973, 439946, 727603, 1455206, 9458839, 18917678]

約数ペア:

[(1, 18917678), (2, 9458839), (13, 1455206), (26, 727603), (43, 439946), (86, 219973), (559, 33842), (1118, 16921)]