16781331

素因数分解:

$3^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{5749}}^1$

素因数の和:5898

約数の個数: 16

約数和(自身を含む): 25760000

約数和(自身を除く): 8978669

約数列:

[1, 3, 7, 21, 139, 417, 973, 2919, 5749, 17247, 40243, 120729, 799111, 2397333, 5593777, 16781331]

約数ペア:

[(1, 16781331), (3, 5593777), (7, 2397333), (21, 799111), (139, 120729), (417, 40243), (973, 17247), (2919, 5749)]