21340491

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{307}}^1$

素因数の和:403

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 10592949

約数列:

[1, 3, 17, 29, 47, 51, 87, 141, 307, 493, 799, 921, 1363, 1479, 2397, 4089, 5219, 8903, 14429, 15657, 23171, 26709, 43287, 69513, 151351, 245293, 418441, 454053, 735879, 1255323, 7113497, 21340491]

約数ペア:

[(1, 21340491), (3, 7113497), (17, 1255323), (29, 735879), (47, 454053), (51, 418441), (87, 245293), (141, 151351), (307, 69513), (493, 43287), (799, 26709), (921, 23171), (1363, 15657), (1479, 14429), (2397, 8903), (4089, 5219)]