21411257

素因数分解:

$7^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{643}}^1$

素因数の和:788

約数の個数: 16

約数和(自身を含む): 25224192

約数和(自身を除く): 3812935

約数列:

[1, 7, 67, 71, 469, 497, 643, 4501, 4757, 33299, 43081, 45653, 301567, 319571, 3058751, 21411257]

約数ペア:

[(1, 21411257), (7, 3058751), (67, 319571), (71, 301567), (469, 45653), (497, 43081), (643, 33299), (4501, 4757)]