28721217

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71983}}^1$

素因数の和:72012

約数の個数: 16

約数和(自身を含む): 46069760

約数和(自身を除く): 17348543

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 71983, 215949, 503881, 1367677, 1511643, 4103031, 9573739, 28721217]

約数ペア:

[(1, 28721217), (3, 9573739), (7, 4103031), (19, 1511643), (21, 1367677), (57, 503881), (133, 215949), (399, 71983)]