20657979

素因数分解:

$3^2\times {\mathrm{23}}^2\times {\mathrm{4339}}^1$

素因数の和:4391

約数の個数: 18

約数和(自身を含む): 31200260

約数和(自身を除く): 10542281

約数列:

[1, 3, 9, 23, 69, 207, 529, 1587, 4339, 4761, 13017, 39051, 99797, 299391, 898173, 2295331, 6885993, 20657979]

約数ペア:

[(1, 20657979), (3, 6885993), (9, 2295331), (23, 898173), (69, 299391), (207, 99797), (529, 39051), (1587, 13017), (4339, 4761)]