90020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{643}}^1$

素因数の和:659

約数の個数: 24

約数和(自身を含む): 216384

約数和(自身を除く): 126364

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 643, 1286, 2572, 3215, 4501, 6430, 9002, 12860, 18004, 22505, 45010, 90020]

約数ペア:

[(1, 90020), (2, 45010), (4, 22505), (5, 18004), (7, 12860), (10, 9002), (14, 6430), (20, 4501), (28, 3215), (35, 2572), (70, 1286), (140, 643)]