21856401

素因数分解:

$3^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{1709}}^1$

素因数の和:1758

約数の個数: 36

約数和(自身を含む): 38013300

約数和(自身を除く): 16156899

約数列:

[1, 3, 7, 9, 21, 29, 49, 63, 87, 147, 203, 261, 441, 609, 1421, 1709, 1827, 4263, 5127, 11963, 12789, 15381, 35889, 49561, 83741, 107667, 148683, 251223, 346927, 446049, 753669, 1040781, 2428489, 3122343, 7285467, 21856401]

約数ペア:

[(1, 21856401), (3, 7285467), (7, 3122343), (9, 2428489), (21, 1040781), (29, 753669), (49, 446049), (63, 346927), (87, 251223), (147, 148683), (203, 107667), (261, 83741), (441, 49561), (609, 35889), (1421, 15381), (1709, 12789), (1827, 11963), (4263, 5127)]