21259443

素因数分解:

$3^1\times {\mathrm{41}}^1\times {\mathrm{307}}^1\times {\mathrm{563}}^1$

素因数の和:914

約数の個数: 16

約数和(自身を含む): 29183616

約数和(自身を除く): 7924173

約数列:

[1, 3, 41, 123, 307, 563, 921, 1689, 12587, 23083, 37761, 69249, 172841, 518523, 7086481, 21259443]

約数ペア:

[(1, 21259443), (3, 7086481), (41, 518523), (123, 172841), (307, 69249), (563, 37761), (921, 23083), (1689, 12587)]