20751951

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{521}}^1$

素因数の和:623

約数の個数: 32

約数和(自身を含む): 32472576

約数和(自身を除く): 11720625

約数列:

[1, 3, 11, 17, 33, 51, 71, 187, 213, 521, 561, 781, 1207, 1563, 2343, 3621, 5731, 8857, 13277, 17193, 26571, 36991, 39831, 97427, 110973, 292281, 406901, 628847, 1220703, 1886541, 6917317, 20751951]

約数ペア:

[(1, 20751951), (3, 6917317), (11, 1886541), (17, 1220703), (33, 628847), (51, 406901), (71, 292281), (187, 110973), (213, 97427), (521, 39831), (561, 36991), (781, 26571), (1207, 17193), (1563, 13277), (2343, 8857), (3621, 5731)]