18988893

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:135

約数の個数: 72

約数和(自身を含む): 35852544

約数和(自身を除く): 16863651

約数列:

[1, 3, 7, 9, 11, 21, 33, 47, 53, 63, 77, 99, 121, 141, 159, 231, 329, 363, 371, 423, 477, 517, 583, 693, 847, 987, 1089, 1113, 1551, 1749, 2491, 2541, 2961, 3339, 3619, 4081, 4653, 5247, 5687, 6413, 7473, 7623, 10857, 12243, 17061, 17437, 19239, 22419, 27401, 32571, 36729, 39809, 44891, 51183, 52311, 57717, 82203, 119427, 134673, 156933, 191807, 246609, 301411, 358281, 404019, 575421, 904233, 1726263, 2109877, 2712699, 6329631, 18988893]

約数ペア:

[(1, 18988893), (3, 6329631), (7, 2712699), (9, 2109877), (11, 1726263), (21, 904233), (33, 575421), (47, 404019), (53, 358281), (63, 301411), (77, 246609), (99, 191807), (121, 156933), (141, 134673), (159, 119427), (231, 82203), (329, 57717), (363, 52311), (371, 51183), (423, 44891), (477, 39809), (517, 36729), (583, 32571), (693, 27401), (847, 22419), (987, 19239), (1089, 17437), (1113, 17061), (1551, 12243), (1749, 10857), (2491, 7623), (2541, 7473), (2961, 6413), (3339, 5687), (3619, 5247), (4081, 4653)]