21001141

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{137}}^1\times {\mathrm{359}}^1$

素因数の和:564

約数の個数: 16

約数和(自身を含む): 24641280

約数和(自身を除く): 3640139

約数列:

[1, 7, 61, 137, 359, 427, 959, 2513, 8357, 21899, 49183, 58499, 153293, 344281, 3000163, 21001141]

約数ペア:

[(1, 21001141), (7, 3000163), (61, 344281), (137, 153293), (359, 58499), (427, 49183), (959, 21899), (2513, 8357)]