20901903

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{811}}^1$

素因数の和:907

約数の個数: 24

約数和(自身を含む): 31102848

約数和(自身を除く): 10200945

約数列:

[1, 3, 11, 33, 71, 121, 213, 363, 781, 811, 2343, 2433, 8591, 8921, 25773, 26763, 57581, 98131, 172743, 294393, 633391, 1900173, 6967301, 20901903]

約数ペア:

[(1, 20901903), (3, 6967301), (11, 1900173), (33, 633391), (71, 294393), (121, 172743), (213, 98131), (363, 57581), (781, 26763), (811, 25773), (2343, 8921), (2433, 8591)]