21620253

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{431}}^1\times {\mathrm{727}}^1$

素因数の和:1184

約数の個数: 16

約数和(自身を含む): 30191616

約数和(自身を除く): 8571363

約数列:

[1, 3, 23, 69, 431, 727, 1293, 2181, 9913, 16721, 29739, 50163, 313337, 940011, 7206751, 21620253]

約数ペア:

[(1, 21620253), (3, 7206751), (23, 940011), (69, 313337), (431, 50163), (727, 29739), (1293, 16721), (2181, 9913)]