18897339

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{263}}^1\times {\mathrm{557}}^1$

素因数の和:866

約数の個数: 16

約数和(自身を含む): 25926912

約数和(自身を除く): 7029573

約数列:

[1, 3, 43, 129, 263, 557, 789, 1671, 11309, 23951, 33927, 71853, 146491, 439473, 6299113, 18897339]

約数ペア:

[(1, 18897339), (3, 6299113), (43, 439473), (129, 146491), (263, 71853), (557, 33927), (789, 23951), (1671, 11309)]