21978970

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{169069}}^1$

素因数の和:169089

約数の個数: 16

約数和(自身を含む): 42605640

約数和(自身を除く): 20626670

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169069, 338138, 845345, 1690690, 2197897, 4395794, 10989485, 21978970]

約数ペア:

[(1, 21978970), (2, 10989485), (5, 4395794), (10, 2197897), (13, 1690690), (26, 845345), (65, 338138), (130, 169069)]