21770199

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{19991}}^1$

素因数の和:20019

約数の個数: 18

約数和(自身を含む): 34566168

約数和(自身を除く): 12795969

約数列:

[1, 3, 9, 11, 33, 99, 121, 363, 1089, 19991, 59973, 179919, 219901, 659703, 1979109, 2418911, 7256733, 21770199]

約数ペア:

[(1, 21770199), (3, 7256733), (9, 2418911), (11, 1979109), (33, 659703), (99, 219901), (121, 179919), (363, 59973), (1089, 19991)]