21290709

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{28051}}^1$

素因数の和:28088

約数の個数: 16

約数和(自身を含む): 32315904

約数和(自身を除く): 11025195

約数列:

[1, 3, 11, 23, 33, 69, 253, 759, 28051, 84153, 308561, 645173, 925683, 1935519, 7096903, 21290709]

約数ペア:

[(1, 21290709), (3, 7096903), (11, 1935519), (23, 925683), (33, 645173), (69, 308561), (253, 84153), (759, 28051)]