31991267

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:232

約数の個数: 32

約数和(自身を含む): 41664000

約数和(自身を除く): 9672733

約数列:

[1, 7, 11, 49, 61, 77, 139, 343, 427, 539, 671, 973, 1529, 2989, 3773, 4697, 6811, 8479, 10703, 20923, 32879, 47677, 59353, 74921, 93269, 230153, 415471, 524447, 652883, 2908297, 4570181, 31991267]

約数ペア:

[(1, 31991267), (7, 4570181), (11, 2908297), (49, 652883), (61, 524447), (77, 415471), (139, 230153), (343, 93269), (427, 74921), (539, 59353), (671, 47677), (973, 32879), (1529, 20923), (2989, 10703), (3773, 8479), (4697, 6811)]