21280996

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{43969}}^1$

素因数の和:43995

約数の個数: 18

約数和(自身を含む): 40936070

約数和(自身を除く): 19655074

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 43969, 87938, 175876, 483659, 967318, 1934636, 5320249, 10640498, 21280996]

約数ペア:

[(1, 21280996), (2, 10640498), (4, 5320249), (11, 1934636), (22, 967318), (44, 483659), (121, 175876), (242, 87938), (484, 43969)]