21980961

素因数分解:

$3^2\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{839}}^1$

素因数の和:957

約数の個数: 24

約数和(自身を含む): 33022080

約数和(自身を除く): 11041119

約数列:

[1, 3, 9, 41, 71, 123, 213, 369, 639, 839, 2517, 2911, 7551, 8733, 26199, 34399, 59569, 103197, 178707, 309591, 536121, 2442329, 7326987, 21980961]

約数ペア:

[(1, 21980961), (3, 7326987), (9, 2442329), (41, 536121), (71, 309591), (123, 178707), (213, 103197), (369, 59569), (639, 34399), (839, 26199), (2517, 8733), (2911, 7551)]