287212820

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{131749}}^1$

素因数の和:131867

約数の個数: 24

約数和(自身を含む): 608685000

約数和(自身を除く): 321472180

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 131749, 263498, 526996, 658745, 1317490, 2634980, 14360641, 28721282, 57442564, 71803205, 143606410, 287212820]

約数ペア:

[(1, 287212820), (2, 143606410), (4, 71803205), (5, 57442564), (10, 28721282), (20, 14360641), (109, 2634980), (218, 1317490), (436, 658745), (545, 526996), (1090, 263498), (2180, 131749)]