21719223

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{809}}^1$

素因数の和:991

約数の個数: 24

約数和(自身を含む): 33274800

約数和(自身を除く): 11555577

約数列:

[1, 3, 9, 19, 57, 157, 171, 471, 809, 1413, 2427, 2983, 7281, 8949, 15371, 26847, 46113, 127013, 138339, 381039, 1143117, 2413247, 7239741, 21719223]

約数ペア:

[(1, 21719223), (3, 7239741), (9, 2413247), (19, 1143117), (57, 381039), (157, 138339), (171, 127013), (471, 46113), (809, 26847), (1413, 15371), (2427, 8949), (2983, 7281)]