21809361

素因数分解:

$3^1\times 7^2\times {\mathrm{89}}^1\times {\mathrm{1667}}^1$

素因数の和:1773

約数の個数: 24

約数和(自身を含む): 34227360

約数和(自身を除く): 12417999

約数列:

[1, 3, 7, 21, 49, 89, 147, 267, 623, 1667, 1869, 4361, 5001, 11669, 13083, 35007, 81683, 148363, 245049, 445089, 1038541, 3115623, 7269787, 21809361]

約数ペア:

[(1, 21809361), (3, 7269787), (7, 3115623), (21, 1038541), (49, 445089), (89, 245049), (147, 148363), (267, 81683), (623, 35007), (1667, 13083), (1869, 11669), (4361, 5001)]