21480459

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{311}}^1$

素因数の和:368

約数の個数: 64

約数和(自身を含む): 40255488

約数和(自身を除く): 18775029

約数列:

[1, 3, 7, 11, 13, 21, 23, 33, 39, 69, 77, 91, 143, 161, 231, 253, 273, 299, 311, 429, 483, 759, 897, 933, 1001, 1771, 2093, 2177, 3003, 3289, 3421, 4043, 5313, 6279, 6531, 7153, 9867, 10263, 12129, 21459, 23023, 23947, 28301, 44473, 50071, 69069, 71841, 78683, 84903, 92989, 133419, 150213, 236049, 278967, 311311, 550781, 650923, 933933, 1022879, 1652343, 1952769, 3068637, 7160153, 21480459]

約数ペア:

[(1, 21480459), (3, 7160153), (7, 3068637), (11, 1952769), (13, 1652343), (21, 1022879), (23, 933933), (33, 650923), (39, 550781), (69, 311311), (77, 278967), (91, 236049), (143, 150213), (161, 133419), (231, 92989), (253, 84903), (273, 78683), (299, 71841), (311, 69069), (429, 50071), (483, 44473), (759, 28301), (897, 23947), (933, 23023), (1001, 21459), (1771, 12129), (2093, 10263), (2177, 9867), (3003, 7153), (3289, 6531), (3421, 6279), (4043, 5313)]