21430490

素因数分解:

$2^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{19661}}^1$

素因数の和:19777

約数の個数: 16

約数和(自身を含む): 38930760

約数和(自身を除く): 17500270

約数列:

[1, 2, 5, 10, 109, 218, 545, 1090, 19661, 39322, 98305, 196610, 2143049, 4286098, 10715245, 21430490]

約数ペア:

[(1, 21430490), (2, 10715245), (5, 4286098), (10, 2143049), (109, 196610), (218, 98305), (545, 39322), (1090, 19661)]