20052440

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{1021}}^1$

素因数の和:1523

約数の個数: 32

約数和(自身を含む): 45254160

約数和(自身を除く): 25201720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1021, 1964, 2042, 2455, 3928, 4084, 4910, 5105, 8168, 9820, 10210, 19640, 20420, 40840, 501311, 1002622, 2005244, 2506555, 4010488, 5013110, 10026220, 20052440]

約数ペア:

[(1, 20052440), (2, 10026220), (4, 5013110), (5, 4010488), (8, 2506555), (10, 2005244), (20, 1002622), (40, 501311), (491, 40840), (982, 20420), (1021, 19640), (1964, 10210), (2042, 9820), (2455, 8168), (3928, 5105), (4084, 4910)]