19281521

素因数分解:

$7^1\times {\mathrm{23}}^2\times {\mathrm{41}}^1\times {\mathrm{127}}^1$

素因数の和:221

約数の個数: 24

約数和(自身を含む): 23783424

約数和(自身を除く): 4501903

約数列:

[1, 7, 23, 41, 127, 161, 287, 529, 889, 943, 2921, 3703, 5207, 6601, 20447, 21689, 36449, 67183, 119761, 151823, 470281, 838327, 2754503, 19281521]

約数ペア:

[(1, 19281521), (7, 2754503), (23, 838327), (41, 470281), (127, 151823), (161, 119761), (287, 67183), (529, 36449), (889, 21689), (943, 20447), (2921, 6601), (3703, 5207)]