81289719

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{107}}^1\times {\mathrm{389}}^1$

素因数の和:540

約数の個数: 48

約数和(自身を含む): 140175360

約数和(自身を除く): 58885641

約数列:

[1, 3, 7, 9, 21, 31, 63, 93, 107, 217, 279, 321, 389, 651, 749, 963, 1167, 1953, 2247, 2723, 3317, 3501, 6741, 8169, 9951, 12059, 23219, 24507, 29853, 36177, 41623, 69657, 84413, 108531, 124869, 208971, 253239, 291361, 374607, 759717, 874083, 1290313, 2622249, 3870939, 9032191, 11612817, 27096573, 81289719]

約数ペア:

[(1, 81289719), (3, 27096573), (7, 11612817), (9, 9032191), (21, 3870939), (31, 2622249), (63, 1290313), (93, 874083), (107, 759717), (217, 374607), (279, 291361), (321, 253239), (389, 208971), (651, 124869), (749, 108531), (963, 84413), (1167, 69657), (1953, 41623), (2247, 36177), (2723, 29853), (3317, 24507), (3501, 23219), (6741, 12059), (8169, 9951)]