21861681

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{197}}^1\times {\mathrm{521}}^1$

素因数の和:792

約数の個数: 16

約数和(自身を含む): 29766528

約数和(自身を除く): 7904847

約数列:

[1, 3, 71, 197, 213, 521, 591, 1563, 13987, 36991, 41961, 102637, 110973, 307911, 7287227, 21861681]

約数ペア:

[(1, 21861681), (3, 7287227), (71, 307911), (197, 110973), (213, 102637), (521, 41961), (591, 36991), (1563, 13987)]