21591213

素因数分解:

$3^1\times 7^2\times {\mathrm{191}}^1\times {\mathrm{769}}^1$

素因数の和:977

約数の個数: 24

約数和(自身を含む): 33707520

約数和(自身を除く): 12116307

約数列:

[1, 3, 7, 21, 49, 147, 191, 573, 769, 1337, 2307, 4011, 5383, 9359, 16149, 28077, 37681, 113043, 146879, 440637, 1028153, 3084459, 7197071, 21591213]

約数ペア:

[(1, 21591213), (3, 7197071), (7, 3084459), (21, 1028153), (49, 440637), (147, 146879), (191, 113043), (573, 37681), (769, 28077), (1337, 16149), (2307, 9359), (4011, 5383)]