16420719

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{127}}^1\times {\mathrm{131}}^1$

素因数の和:315

約数の個数: 32

約数和(自身を含む): 25952256

約数和(自身を除く): 9531537

約数列:

[1, 3, 7, 21, 47, 127, 131, 141, 329, 381, 393, 889, 917, 987, 2667, 2751, 5969, 6157, 16637, 17907, 18471, 41783, 43099, 49911, 116459, 125349, 129297, 349377, 781939, 2345817, 5473573, 16420719]

約数ペア:

[(1, 16420719), (3, 5473573), (7, 2345817), (21, 781939), (47, 349377), (127, 129297), (131, 125349), (141, 116459), (329, 49911), (381, 43099), (393, 41783), (889, 18471), (917, 17907), (987, 16637), (2667, 6157), (2751, 5969)]