21337641

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1$

素因数の和:143

約数の個数: 64

約数和(自身を含む): 36771840

約数和(自身を除く): 15434199

約数列:

[1, 3, 9, 13, 27, 31, 37, 39, 53, 93, 111, 117, 159, 279, 333, 351, 403, 477, 481, 689, 837, 999, 1147, 1209, 1431, 1443, 1643, 1961, 2067, 3441, 3627, 4329, 4929, 5883, 6201, 10323, 10881, 12987, 14787, 14911, 17649, 18603, 21359, 25493, 30969, 44361, 44733, 52947, 60791, 64077, 76479, 134199, 182373, 192231, 229437, 402597, 547119, 576693, 688311, 790283, 1641357, 2370849, 7112547, 21337641]

約数ペア:

[(1, 21337641), (3, 7112547), (9, 2370849), (13, 1641357), (27, 790283), (31, 688311), (37, 576693), (39, 547119), (53, 402597), (93, 229437), (111, 192231), (117, 182373), (159, 134199), (279, 76479), (333, 64077), (351, 60791), (403, 52947), (477, 44733), (481, 44361), (689, 30969), (837, 25493), (999, 21359), (1147, 18603), (1209, 17649), (1431, 14911), (1443, 14787), (1643, 12987), (1961, 10881), (2067, 10323), (3441, 6201), (3627, 5883), (4329, 4929)]