21280454

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{15443}}^1$

素因数の和:15511

約数の個数: 16

約数和(自身を含む): 35026992

約数和(自身を除く): 13746538

約数列:

[1, 2, 13, 26, 53, 106, 689, 1378, 15443, 30886, 200759, 401518, 818479, 1636958, 10640227, 21280454]

約数ペア:

[(1, 21280454), (2, 10640227), (13, 1636958), (26, 818479), (53, 401518), (106, 200759), (689, 30886), (1378, 15443)]