161856261

素因数分解:

$3^2\times 7^2\times {\mathrm{367021}}^1$

素因数の和:367041

約数の個数: 18

約数和(自身を含む): 271963302

約数和(自身を除く): 110107041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 367021, 1101063, 2569147, 3303189, 7707441, 17984029, 23122323, 53952087, 161856261]

約数ペア:

[(1, 161856261), (3, 53952087), (7, 23122323), (9, 17984029), (21, 7707441), (49, 3303189), (63, 2569147), (147, 1101063), (441, 367021)]