21084840

素因数分解:

$2^3\times 3^3\times 5^1\times 7^1\times {\mathrm{2789}}^1$

素因数の和:2816

約数の個数: 128

約数和(自身を含む): 80352000

約数和(自身を除く): 59267160

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 45, 54, 56, 60, 63, 70, 72, 84, 90, 105, 108, 120, 126, 135, 140, 168, 180, 189, 210, 216, 252, 270, 280, 315, 360, 378, 420, 504, 540, 630, 756, 840, 945, 1080, 1260, 1512, 1890, 2520, 2789, 3780, 5578, 7560, 8367, 11156, 13945, 16734, 19523, 22312, 25101, 27890, 33468, 39046, 41835, 50202, 55780, 58569, 66936, 75303, 78092, 83670, 97615, 100404, 111560, 117138, 125505, 150606, 156184, 167340, 175707, 195230, 200808, 234276, 251010, 292845, 301212, 334680, 351414, 376515, 390460, 468552, 502020, 527121, 585690, 602424, 702828, 753030, 780920, 878535, 1004040, 1054242, 1171380, 1405656, 1506060, 1757070, 2108484, 2342760, 2635605, 3012120, 3514140, 4216968, 5271210, 7028280, 10542420, 21084840]

約数ペア:

[(1, 21084840), (2, 10542420), (3, 7028280), (4, 5271210), (5, 4216968), (6, 3514140), (7, 3012120), (8, 2635605), (9, 2342760), (10, 2108484), (12, 1757070), (14, 1506060), (15, 1405656), (18, 1171380), (20, 1054242), (21, 1004040), (24, 878535), (27, 780920), (28, 753030), (30, 702828), (35, 602424), (36, 585690), (40, 527121), (42, 502020), (45, 468552), (54, 390460), (56, 376515), (60, 351414), (63, 334680), (70, 301212), (72, 292845), (84, 251010), (90, 234276), (105, 200808), (108, 195230), (120, 175707), (126, 167340), (135, 156184), (140, 150606), (168, 125505), (180, 117138), (189, 111560), (210, 100404), (216, 97615), (252, 83670), (270, 78092), (280, 75303), (315, 66936), (360, 58569), (378, 55780), (420, 50202), (504, 41835), (540, 39046), (630, 33468), (756, 27890), (840, 25101), (945, 22312), (1080, 19523), (1260, 16734), (1512, 13945), (1890, 11156), (2520, 8367), (2789, 7560), (3780, 5578)]