20821367

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{229}}^1\times {\mathrm{419}}^1$

素因数の和:686

約数の個数: 16

約数和(自身を含む): 24729600

約数和(自身を除く): 3908233

約数列:

[1, 7, 31, 217, 229, 419, 1603, 2933, 7099, 12989, 49693, 90923, 95951, 671657, 2974481, 20821367]

約数ペア:

[(1, 20821367), (7, 2974481), (31, 671657), (217, 95951), (229, 90923), (419, 49693), (1603, 12989), (2933, 7099)]