21456267

素因数分解:

$3^1\times 7^2\times {\mathrm{227}}^1\times {\mathrm{643}}^1$

素因数の和:887

約数の個数: 24

約数和(自身を含む): 33477696

約数和(自身を除く): 12021429

約数列:

[1, 3, 7, 21, 49, 147, 227, 643, 681, 1589, 1929, 4501, 4767, 11123, 13503, 31507, 33369, 94521, 145961, 437883, 1021727, 3065181, 7152089, 21456267]

約数ペア:

[(1, 21456267), (3, 7152089), (7, 3065181), (21, 1021727), (49, 437883), (147, 145961), (227, 94521), (643, 33369), (681, 31507), (1589, 13503), (1929, 11123), (4501, 4767)]