21109109

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{1093}}^1$

素因数の和:1220

約数の個数: 16

約数和(自身を含む): 25205760

約数和(自身を除く): 4096651

約数列:

[1, 7, 31, 89, 217, 623, 1093, 2759, 7651, 19313, 33883, 97277, 237181, 680939, 3015587, 21109109]

約数ペア:

[(1, 21109109), (7, 3015587), (31, 680939), (89, 237181), (217, 97277), (623, 33883), (1093, 19313), (2759, 7651)]