21001680

素因数分解:

$2^4\times 3^4\times 5^1\times 7^1\times {\mathrm{463}}^1$

素因数の和:495

約数の個数: 200

約数和(自身を含む): 83542272

約数和(自身を除く): 62540592

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 45, 48, 54, 56, 60, 63, 70, 72, 80, 81, 84, 90, 105, 108, 112, 120, 126, 135, 140, 144, 162, 168, 180, 189, 210, 216, 240, 252, 270, 280, 315, 324, 336, 360, 378, 405, 420, 432, 463, 504, 540, 560, 567, 630, 648, 720, 756, 810, 840, 926, 945, 1008, 1080, 1134, 1260, 1296, 1389, 1512, 1620, 1680, 1852, 1890, 2160, 2268, 2315, 2520, 2778, 2835, 3024, 3240, 3241, 3704, 3780, 4167, 4536, 4630, 5040, 5556, 5670, 6480, 6482, 6945, 7408, 7560, 8334, 9072, 9260, 9723, 11112, 11340, 12501, 12964, 13890, 15120, 16205, 16668, 18520, 19446, 20835, 22224, 22680, 25002, 25928, 27780, 29169, 32410, 33336, 37040, 37503, 38892, 41670, 45360, 48615, 50004, 51856, 55560, 58338, 62505, 64820, 66672, 75006, 77784, 83340, 87507, 97230, 100008, 111120, 116676, 125010, 129640, 145845, 150012, 155568, 166680, 175014, 187515, 194460, 200016, 233352, 250020, 259280, 262521, 291690, 300024, 333360, 350028, 375030, 388920, 437535, 466704, 500040, 525042, 583380, 600048, 700056, 750060, 777840, 875070, 1000080, 1050084, 1166760, 1312605, 1400112, 1500120, 1750140, 2100168, 2333520, 2625210, 3000240, 3500280, 4200336, 5250420, 7000560, 10500840, 21001680]

約数ペア:

[(1, 21001680), (2, 10500840), (3, 7000560), (4, 5250420), (5, 4200336), (6, 3500280), (7, 3000240), (8, 2625210), (9, 2333520), (10, 2100168), (12, 1750140), (14, 1500120), (15, 1400112), (16, 1312605), (18, 1166760), (20, 1050084), (21, 1000080), (24, 875070), (27, 777840), (28, 750060), (30, 700056), (35, 600048), (36, 583380), (40, 525042), (42, 500040), (45, 466704), (48, 437535), (54, 388920), (56, 375030), (60, 350028), (63, 333360), (70, 300024), (72, 291690), (80, 262521), (81, 259280), (84, 250020), (90, 233352), (105, 200016), (108, 194460), (112, 187515), (120, 175014), (126, 166680), (135, 155568), (140, 150012), (144, 145845), (162, 129640), (168, 125010), (180, 116676), (189, 111120), (210, 100008), (216, 97230), (240, 87507), (252, 83340), (270, 77784), (280, 75006), (315, 66672), (324, 64820), (336, 62505), (360, 58338), (378, 55560), (405, 51856), (420, 50004), (432, 48615), (463, 45360), (504, 41670), (540, 38892), (560, 37503), (567, 37040), (630, 33336), (648, 32410), (720, 29169), (756, 27780), (810, 25928), (840, 25002), (926, 22680), (945, 22224), (1008, 20835), (1080, 19446), (1134, 18520), (1260, 16668), (1296, 16205), (1389, 15120), (1512, 13890), (1620, 12964), (1680, 12501), (1852, 11340), (1890, 11112), (2160, 9723), (2268, 9260), (2315, 9072), (2520, 8334), (2778, 7560), (2835, 7408), (3024, 6945), (3240, 6482), (3241, 6480), (3704, 5670), (3780, 5556), (4167, 5040), (4536, 4630)]