21681429

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{1997}}^1$

素因数の和:2065

約数の個数: 32

約数和(自身を含む): 36827136

約数和(自身を除く): 15145707

約数列:

[1, 3, 7, 11, 21, 33, 47, 77, 141, 231, 329, 517, 987, 1551, 1997, 3619, 5991, 10857, 13979, 21967, 41937, 65901, 93859, 153769, 281577, 461307, 657013, 1032449, 1971039, 3097347, 7227143, 21681429]

約数ペア:

[(1, 21681429), (3, 7227143), (7, 3097347), (11, 1971039), (21, 1032449), (33, 657013), (47, 461307), (77, 281577), (141, 153769), (231, 93859), (329, 65901), (517, 41937), (987, 21967), (1551, 13979), (1997, 10857), (3619, 5991)]