18881479729

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{20280859}}^1$

素因数の和:20280892

約数の個数: 12

約数和(自身を含む): 23120180400

約数和(自身を除く): 4238700671

約数列:

[1, 7, 19, 49, 133, 931, 20280859, 141966013, 385336321, 993762091, 2697354247, 18881479729]

約数ペア:

[(1, 18881479729), (7, 2697354247), (19, 993762091), (49, 385336321), (133, 141966013), (931, 20280859)]