21054687

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{293}}^1\times {\mathrm{1409}}^1$

素因数の和:1722

約数の個数: 16

約数和(自身を含む): 29846880

約数和(自身を除く): 8792193

約数列:

[1, 3, 17, 51, 293, 879, 1409, 4227, 4981, 14943, 23953, 71859, 412837, 1238511, 7018229, 21054687]

約数ペア:

[(1, 21054687), (3, 7018229), (17, 1238511), (51, 412837), (293, 71859), (879, 23953), (1409, 14943), (4227, 4981)]