21421827

素因数分解:

$3^4\times 7^1\times {\mathrm{37781}}^1$

素因数の和:37800

約数の個数: 20

約数和(自身を含む): 36572976

約数和(自身を除く): 15151149

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 37781, 113343, 264467, 340029, 793401, 1020087, 2380203, 3060261, 7140609, 21421827]

約数ペア:

[(1, 21421827), (3, 7140609), (7, 3060261), (9, 2380203), (21, 1020087), (27, 793401), (63, 340029), (81, 264467), (189, 113343), (567, 37781)]