81713520

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{523}}^1$

素因数の和:580

約数の個数: 240

約数和(自身を含む): 324360192

約数和(自身を除く): 242646672

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 31, 35, 36, 40, 42, 45, 48, 56, 60, 62, 63, 70, 72, 80, 84, 90, 93, 105, 112, 120, 124, 126, 140, 144, 155, 168, 180, 186, 210, 217, 240, 248, 252, 279, 280, 310, 315, 336, 360, 372, 420, 434, 465, 496, 504, 523, 558, 560, 620, 630, 651, 720, 744, 840, 868, 930, 1008, 1046, 1085, 1116, 1240, 1260, 1302, 1395, 1488, 1569, 1680, 1736, 1860, 1953, 2092, 2170, 2232, 2480, 2520, 2604, 2615, 2790, 3138, 3255, 3472, 3661, 3720, 3906, 4184, 4340, 4464, 4707, 5040, 5208, 5230, 5580, 6276, 6510, 7322, 7440, 7812, 7845, 8368, 8680, 9414, 9765, 10416, 10460, 10983, 11160, 12552, 13020, 14644, 15624, 15690, 16213, 17360, 18305, 18828, 19530, 20920, 21966, 22320, 23535, 25104, 26040, 29288, 31248, 31380, 32426, 32949, 36610, 37656, 39060, 41840, 43932, 47070, 48639, 52080, 54915, 58576, 62760, 64852, 65898, 73220, 75312, 78120, 81065, 87864, 94140, 97278, 109830, 113491, 125520, 129704, 131796, 145917, 146440, 156240, 162130, 164745, 175728, 188280, 194556, 219660, 226982, 243195, 259408, 263592, 291834, 292880, 324260, 329490, 340473, 376560, 389112, 439320, 453964, 486390, 527184, 567455, 583668, 648520, 658980, 680946, 729585, 778224, 878640, 907928, 972780, 1021419, 1134910, 1167336, 1297040, 1317960, 1361892, 1459170, 1702365, 1815856, 1945560, 2042838, 2269820, 2334672, 2635920, 2723784, 2918340, 3404730, 3891120, 4085676, 4539640, 5107095, 5447568, 5836680, 6809460, 8171352, 9079280, 10214190, 11673360, 13618920, 16342704, 20428380, 27237840, 40856760, 81713520]

約数ペア:

[(1, 81713520), (2, 40856760), (3, 27237840), (4, 20428380), (5, 16342704), (6, 13618920), (7, 11673360), (8, 10214190), (9, 9079280), (10, 8171352), (12, 6809460), (14, 5836680), (15, 5447568), (16, 5107095), (18, 4539640), (20, 4085676), (21, 3891120), (24, 3404730), (28, 2918340), (30, 2723784), (31, 2635920), (35, 2334672), (36, 2269820), (40, 2042838), (42, 1945560), (45, 1815856), (48, 1702365), (56, 1459170), (60, 1361892), (62, 1317960), (63, 1297040), (70, 1167336), (72, 1134910), (80, 1021419), (84, 972780), (90, 907928), (93, 878640), (105, 778224), (112, 729585), (120, 680946), (124, 658980), (126, 648520), (140, 583668), (144, 567455), (155, 527184), (168, 486390), (180, 453964), (186, 439320), (210, 389112), (217, 376560), (240, 340473), (248, 329490), (252, 324260), (279, 292880), (280, 291834), (310, 263592), (315, 259408), (336, 243195), (360, 226982), (372, 219660), (420, 194556), (434, 188280), (465, 175728), (496, 164745), (504, 162130), (523, 156240), (558, 146440), (560, 145917), (620, 131796), (630, 129704), (651, 125520), (720, 113491), (744, 109830), (840, 97278), (868, 94140), (930, 87864), (1008, 81065), (1046, 78120), (1085, 75312), (1116, 73220), (1240, 65898), (1260, 64852), (1302, 62760), (1395, 58576), (1488, 54915), (1569, 52080), (1680, 48639), (1736, 47070), (1860, 43932), (1953, 41840), (2092, 39060), (2170, 37656), (2232, 36610), (2480, 32949), (2520, 32426), (2604, 31380), (2615, 31248), (2790, 29288), (3138, 26040), (3255, 25104), (3472, 23535), (3661, 22320), (3720, 21966), (3906, 20920), (4184, 19530), (4340, 18828), (4464, 18305), (4707, 17360), (5040, 16213), (5208, 15690), (5230, 15624), (5580, 14644), (6276, 13020), (6510, 12552), (7322, 11160), (7440, 10983), (7812, 10460), (7845, 10416), (8368, 9765), (8680, 9414)]