21000756

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{233}}^1$

素因数の和:313

約数の個数: 96

約数和(自身を含む): 59754240

約数和(自身を除く): 38753484

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 29, 37, 42, 58, 74, 84, 87, 111, 116, 148, 174, 203, 222, 233, 259, 348, 406, 444, 466, 518, 609, 699, 777, 812, 932, 1036, 1073, 1218, 1398, 1554, 1631, 2146, 2436, 2796, 3108, 3219, 3262, 4292, 4893, 6438, 6524, 6757, 7511, 8621, 9786, 12876, 13514, 15022, 17242, 19572, 20271, 22533, 25863, 27028, 30044, 34484, 40542, 45066, 47299, 51726, 60347, 81084, 90132, 94598, 103452, 120694, 141897, 181041, 189196, 241388, 250009, 283794, 362082, 500018, 567588, 724164, 750027, 1000036, 1500054, 1750063, 3000108, 3500126, 5250189, 7000252, 10500378, 21000756]

約数ペア:

[(1, 21000756), (2, 10500378), (3, 7000252), (4, 5250189), (6, 3500126), (7, 3000108), (12, 1750063), (14, 1500054), (21, 1000036), (28, 750027), (29, 724164), (37, 567588), (42, 500018), (58, 362082), (74, 283794), (84, 250009), (87, 241388), (111, 189196), (116, 181041), (148, 141897), (174, 120694), (203, 103452), (222, 94598), (233, 90132), (259, 81084), (348, 60347), (406, 51726), (444, 47299), (466, 45066), (518, 40542), (609, 34484), (699, 30044), (777, 27028), (812, 25863), (932, 22533), (1036, 20271), (1073, 19572), (1218, 17242), (1398, 15022), (1554, 13514), (1631, 12876), (2146, 9786), (2436, 8621), (2796, 7511), (3108, 6757), (3219, 6524), (3262, 6438), (4292, 4893)]