21361521

素因数分解:

$3^1\times {\mathrm{79}}^1\times {\mathrm{173}}^1\times {\mathrm{521}}^1$

素因数の和:776

約数の個数: 16

約数和(自身を含む): 29064960

約数和(自身を除く): 7703439

約数列:

[1, 3, 79, 173, 237, 519, 521, 1563, 13667, 41001, 41159, 90133, 123477, 270399, 7120507, 21361521]

約数ペア:

[(1, 21361521), (3, 7120507), (79, 270399), (173, 123477), (237, 90133), (519, 41159), (521, 41001), (1563, 13667)]