18851991

素因数分解:

$3^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{1321}}^1$

素因数の和:1462

約数の個数: 16

約数和(自身を含む): 25890048

約数和(自身を除く): 7038057

約数列:

[1, 3, 67, 71, 201, 213, 1321, 3963, 4757, 14271, 88507, 93791, 265521, 281373, 6283997, 18851991]

約数ペア:

[(1, 18851991), (3, 6283997), (67, 281373), (71, 265521), (201, 93791), (213, 88507), (1321, 14271), (3963, 4757)]