21688401

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1\times {\mathrm{271}}^1$

素因数の和:421

約数の個数: 32

約数和(自身を含む): 34398208

約数和(自身を除く): 12709807

約数列:

[1, 3, 7, 21, 37, 103, 111, 259, 271, 309, 721, 777, 813, 1897, 2163, 3811, 5691, 10027, 11433, 26677, 27913, 30081, 70189, 80031, 83739, 195391, 210567, 586173, 1032781, 3098343, 7229467, 21688401]

約数ペア:

[(1, 21688401), (3, 7229467), (7, 3098343), (21, 1032781), (37, 586173), (103, 210567), (111, 195391), (259, 83739), (271, 80031), (309, 70189), (721, 30081), (777, 27913), (813, 26677), (1897, 11433), (2163, 10027), (3811, 5691)]