21688795

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{241}}^1\times {\mathrm{439}}^1$

素因数の和:726

約数の個数: 16

約数和(自身を含む): 26832960

約数和(自身を除く): 5144165

約数列:

[1, 5, 41, 205, 241, 439, 1205, 2195, 9881, 17999, 49405, 89995, 105799, 528995, 4337759, 21688795]

約数ペア:

[(1, 21688795), (5, 4337759), (41, 528995), (205, 105799), (241, 89995), (439, 49405), (1205, 17999), (2195, 9881)]