21253917

素因数分解:

$3^1\times {\mathrm{47}}^1\times {\mathrm{307}}^1\times {\mathrm{491}}^1$

素因数の和:848

約数の個数: 16

約数和(自身を含む): 29094912

約数和(自身を除く): 7840995

約数列:

[1, 3, 47, 141, 307, 491, 921, 1473, 14429, 23077, 43287, 69231, 150737, 452211, 7084639, 21253917]

約数ペア:

[(1, 21253917), (3, 7084639), (47, 452211), (141, 150737), (307, 69231), (491, 43287), (921, 23077), (1473, 14429)]