257328540

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{1559}}^1$

素因数の和:1712

約数の個数: 144

約数和(自身を含む): 899458560

約数和(自身を除く): 642130020

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 131, 140, 180, 210, 252, 262, 315, 393, 420, 524, 630, 655, 786, 917, 1179, 1260, 1310, 1559, 1572, 1834, 1965, 2358, 2620, 2751, 3118, 3668, 3930, 4585, 4677, 4716, 5502, 5895, 6236, 7795, 7860, 8253, 9170, 9354, 10913, 11004, 11790, 13755, 14031, 15590, 16506, 18340, 18708, 21826, 23385, 23580, 27510, 28062, 31180, 32739, 33012, 41265, 43652, 46770, 54565, 55020, 56124, 65478, 70155, 82530, 93540, 98217, 109130, 130956, 140310, 163695, 165060, 196434, 204229, 218260, 280620, 327390, 392868, 408458, 491085, 612687, 654780, 816916, 982170, 1021145, 1225374, 1429603, 1838061, 1964340, 2042290, 2450748, 2859206, 3063435, 3676122, 4084580, 4288809, 5718412, 6126870, 7148015, 7352244, 8577618, 9190305, 12253740, 12866427, 14296030, 17155236, 18380610, 21444045, 25732854, 28592060, 36761220, 42888090, 51465708, 64332135, 85776180, 128664270, 257328540]

約数ペア:

[(1, 257328540), (2, 128664270), (3, 85776180), (4, 64332135), (5, 51465708), (6, 42888090), (7, 36761220), (9, 28592060), (10, 25732854), (12, 21444045), (14, 18380610), (15, 17155236), (18, 14296030), (20, 12866427), (21, 12253740), (28, 9190305), (30, 8577618), (35, 7352244), (36, 7148015), (42, 6126870), (45, 5718412), (60, 4288809), (63, 4084580), (70, 3676122), (84, 3063435), (90, 2859206), (105, 2450748), (126, 2042290), (131, 1964340), (140, 1838061), (180, 1429603), (210, 1225374), (252, 1021145), (262, 982170), (315, 816916), (393, 654780), (420, 612687), (524, 491085), (630, 408458), (655, 392868), (786, 327390), (917, 280620), (1179, 218260), (1260, 204229), (1310, 196434), (1559, 165060), (1572, 163695), (1834, 140310), (1965, 130956), (2358, 109130), (2620, 98217), (2751, 93540), (3118, 82530), (3668, 70155), (3930, 65478), (4585, 56124), (4677, 55020), (4716, 54565), (5502, 46770), (5895, 43652), (6236, 41265), (7795, 33012), (7860, 32739), (8253, 31180), (9170, 28062), (9354, 27510), (10913, 23580), (11004, 23385), (11790, 21826), (13755, 18708), (14031, 18340), (15590, 16506)]