128820741

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{322859}}^1$

素因数の和:322888

約数の個数: 16

約数和(自身を含む): 206630400

約数和(自身を除く): 77809659

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 322859, 968577, 2260013, 6134321, 6780039, 18402963, 42940247, 128820741]

約数ペア:

[(1, 128820741), (3, 42940247), (7, 18402963), (19, 6780039), (21, 6134321), (57, 2260013), (133, 968577), (399, 322859)]