21242090

素因数分解:

$2^1\times 5^1\times {\mathrm{653}}^1\times {\mathrm{3253}}^1$

素因数の和:3913

約数の個数: 16

約数和(自身を含む): 38306088

約数和(自身を除く): 17063998

約数列:

[1, 2, 5, 10, 653, 1306, 3253, 3265, 6506, 6530, 16265, 32530, 2124209, 4248418, 10621045, 21242090]

約数ペア:

[(1, 21242090), (2, 10621045), (5, 4248418), (10, 2124209), (653, 32530), (1306, 16265), (3253, 6530), (3265, 6506)]