17990020

素因数分解:

$2^2\times 5^1\times {\mathrm{881}}^1\times {\mathrm{1021}}^1$

素因数の和:1911

約数の個数: 24

約数和(自身を含む): 37858968

約数和(自身を除く): 19868948

約数列:

[1, 2, 4, 5, 10, 20, 881, 1021, 1762, 2042, 3524, 4084, 4405, 5105, 8810, 10210, 17620, 20420, 899501, 1799002, 3598004, 4497505, 8995010, 17990020]

約数ペア:

[(1, 17990020), (2, 8995010), (4, 4497505), (5, 3598004), (10, 1799002), (20, 899501), (881, 20420), (1021, 17620), (1762, 10210), (2042, 8810), (3524, 5105), (4084, 4405)]