19903419

素因数分解:

$3^2\times {\mathrm{47}}^1\times {\mathrm{211}}^1\times {\mathrm{223}}^1$

素因数の和:487

約数の個数: 24

約数和(自身を含む): 29632512

約数和(自身を除く): 9729093

約数列:

[1, 3, 9, 47, 141, 211, 223, 423, 633, 669, 1899, 2007, 9917, 10481, 29751, 31443, 47053, 89253, 94329, 141159, 423477, 2211491, 6634473, 19903419]

約数ペア:

[(1, 19903419), (3, 6634473), (9, 2211491), (47, 423477), (141, 141159), (211, 94329), (223, 89253), (423, 47053), (633, 31443), (669, 29751), (1899, 10481), (2007, 9917)]