21171087

素因数分解:

$3^2\times 7^2\times {\mathrm{61}}^1\times {\mathrm{787}}^1$

素因数の和:868

約数の個数: 36

約数和(自身を含む): 36202296

約数和(自身を除く): 15031209

約数列:

[1, 3, 7, 9, 21, 49, 61, 63, 147, 183, 427, 441, 549, 787, 1281, 2361, 2989, 3843, 5509, 7083, 8967, 16527, 26901, 38563, 48007, 49581, 115689, 144021, 336049, 347067, 432063, 1008147, 2352343, 3024441, 7057029, 21171087]

約数ペア:

[(1, 21171087), (3, 7057029), (7, 3024441), (9, 2352343), (21, 1008147), (49, 432063), (61, 347067), (63, 336049), (147, 144021), (183, 115689), (427, 49581), (441, 48007), (549, 38563), (787, 26901), (1281, 16527), (2361, 8967), (2989, 7083), (3843, 5509)]