20807080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{74311}}^1$

素因数の和:74329

約数の個数: 32

約数和(自身を含む): 53504640

約数和(自身を除く): 32697560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 74311, 148622, 297244, 371555, 520177, 594488, 743110, 1040354, 1486220, 2080708, 2600885, 2972440, 4161416, 5201770, 10403540, 20807080]

約数ペア:

[(1, 20807080), (2, 10403540), (4, 5201770), (5, 4161416), (7, 2972440), (8, 2600885), (10, 2080708), (14, 1486220), (20, 1040354), (28, 743110), (35, 594488), (40, 520177), (56, 371555), (70, 297244), (140, 148622), (280, 74311)]