21954969

素因数分解:

$3^4\times {\mathrm{47}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1$

素因数の和:211

約数の個数: 40

約数和(自身を含む): 34383360

約数和(自身を除く): 12428391

約数列:

[1, 3, 9, 27, 47, 73, 79, 81, 141, 219, 237, 423, 657, 711, 1269, 1971, 2133, 3431, 3713, 3807, 5767, 5913, 6399, 10293, 11139, 17301, 30879, 33417, 51903, 92637, 100251, 155709, 271049, 277911, 300753, 467127, 813147, 2439441, 7318323, 21954969]

約数ペア:

[(1, 21954969), (3, 7318323), (9, 2439441), (27, 813147), (47, 467127), (73, 300753), (79, 277911), (81, 271049), (141, 155709), (219, 100251), (237, 92637), (423, 51903), (657, 33417), (711, 30879), (1269, 17301), (1971, 11139), (2133, 10293), (3431, 6399), (3713, 5913), (3807, 5767)]