161855420

素因数分解:

$2^2\times 5^1\times {\mathrm{1039}}^1\times {\mathrm{7789}}^1$

素因数の和:8837

約数の個数: 24

約数和(自身を含む): 340267200

約数和(自身を除く): 178411780

約数列:

[1, 2, 4, 5, 10, 20, 1039, 2078, 4156, 5195, 7789, 10390, 15578, 20780, 31156, 38945, 77890, 155780, 8092771, 16185542, 32371084, 40463855, 80927710, 161855420]

約数ペア:

[(1, 161855420), (2, 80927710), (4, 40463855), (5, 32371084), (10, 16185542), (20, 8092771), (1039, 155780), (2078, 77890), (4156, 38945), (5195, 31156), (7789, 20780), (10390, 15578)]