21232881

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{167}}^1\times {\mathrm{277}}^1$

素因数の和:470

約数の個数: 32

約数和(自身を含む): 33626880

約数和(自身を除く): 12393999

約数列:

[1, 3, 9, 17, 27, 51, 153, 167, 277, 459, 501, 831, 1503, 2493, 2839, 4509, 4709, 7479, 8517, 14127, 25551, 42381, 46259, 76653, 127143, 138777, 416331, 786403, 1248993, 2359209, 7077627, 21232881]

約数ペア:

[(1, 21232881), (3, 7077627), (9, 2359209), (17, 1248993), (27, 786403), (51, 416331), (153, 138777), (167, 127143), (277, 76653), (459, 46259), (501, 42381), (831, 25551), (1503, 14127), (2493, 8517), (2839, 7479), (4509, 4709)]