81139709

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{193}}^1$

素因数の和:357

約数の個数: 32

約数和(自身を含む): 102432000

約数和(自身を除く): 21292291

約数列:

[1, 7, 19, 29, 109, 133, 193, 203, 551, 763, 1351, 2071, 3161, 3667, 3857, 5597, 14497, 21037, 22127, 25669, 39179, 60059, 106343, 147259, 399703, 420413, 610073, 744401, 2797921, 4270511, 11591387, 81139709]

約数ペア:

[(1, 81139709), (7, 11591387), (19, 4270511), (29, 2797921), (109, 744401), (133, 610073), (193, 420413), (203, 399703), (551, 147259), (763, 106343), (1351, 60059), (2071, 39179), (3161, 25669), (3667, 22127), (3857, 21037), (5597, 14497)]