21216993

素因数分解:

$3^1\times 7^1\times {\mathrm{113}}^1\times {\mathrm{8941}}^1$

素因数の和:9064

約数の個数: 16

約数和(自身を含む): 32620416

約数和(自身を除く): 11403423

約数列:

[1, 3, 7, 21, 113, 339, 791, 2373, 8941, 26823, 62587, 187761, 1010333, 3030999, 7072331, 21216993]

約数ペア:

[(1, 21216993), (3, 7072331), (7, 3030999), (21, 1010333), (113, 187761), (339, 62587), (791, 26823), (2373, 8941)]