28390390

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{405577}}^1$

素因数の和:405591

約数の個数: 16

約数和(自身を含む): 58403232

約数和(自身を除く): 30012842

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 405577, 811154, 2027885, 2839039, 4055770, 5678078, 14195195, 28390390]

約数ペア:

[(1, 28390390), (2, 14195195), (5, 5678078), (7, 4055770), (10, 2839039), (14, 2027885), (35, 811154), (70, 405577)]