21193971

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{409}}^1\times {\mathrm{751}}^1$

素因数の和:1186

約数の個数: 16

約数和(自身を含む): 29598720

約数和(自身を除く): 8404749

約数列:

[1, 3, 23, 69, 409, 751, 1227, 2253, 9407, 17273, 28221, 51819, 307159, 921477, 7064657, 21193971]

約数ペア:

[(1, 21193971), (3, 7064657), (23, 921477), (69, 307159), (409, 51819), (751, 28221), (1227, 17273), (2253, 9407)]