81690280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{291751}}^1$

素因数の和:291769

約数の個数: 32

約数和(自身を含む): 210061440

約数和(自身を除く): 128371160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 291751, 583502, 1167004, 1458755, 2042257, 2334008, 2917510, 4084514, 5835020, 8169028, 10211285, 11670040, 16338056, 20422570, 40845140, 81690280]

約数ペア:

[(1, 81690280), (2, 40845140), (4, 20422570), (5, 16338056), (7, 11670040), (8, 10211285), (10, 8169028), (14, 5835020), (20, 4084514), (28, 2917510), (35, 2334008), (40, 2042257), (56, 1458755), (70, 1167004), (140, 583502), (280, 291751)]