20001961

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1\times {\mathrm{337}}^1$

素因数の和:544

約数の個数: 16

約数和(自身を含む): 23470720

約数和(自身を除く): 3468759

約数列:

[1, 7, 61, 139, 337, 427, 973, 2359, 8479, 20557, 46843, 59353, 143899, 327901, 2857423, 20001961]

約数ペア:

[(1, 20001961), (7, 2857423), (61, 327901), (139, 143899), (337, 59353), (427, 46843), (973, 20557), (2359, 8479)]