21555671

素因数分解:

${\mathrm{19}}^2\times {\mathrm{29}}^2\times {\mathrm{71}}^1$

素因数の和:167

約数の個数: 18

約数和(自身を含む): 23893272

約数和(自身を除く): 2337601

約数列:

[1, 19, 29, 71, 361, 551, 841, 1349, 2059, 10469, 15979, 25631, 39121, 59711, 303601, 743299, 1134509, 21555671]

約数ペア:

[(1, 21555671), (19, 1134509), (29, 743299), (71, 303601), (361, 59711), (551, 39121), (841, 25631), (1349, 15979), (2059, 10469)]