21586719

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{239}}^1$

素因数の和:300

約数の個数: 64

約数和(自身を含む): 39813120

約数和(自身を除く): 18226401

約数列:

[1, 3, 7, 11, 17, 21, 23, 33, 51, 69, 77, 119, 161, 187, 231, 239, 253, 357, 391, 483, 561, 717, 759, 1173, 1309, 1673, 1771, 2629, 2737, 3927, 4063, 4301, 5019, 5313, 5497, 7887, 8211, 12189, 12903, 16491, 18403, 28441, 30107, 38479, 44693, 55209, 60467, 85323, 90321, 93449, 115437, 134079, 181401, 280347, 312851, 423269, 654143, 938553, 1027939, 1269807, 1962429, 3083817, 7195573, 21586719]

約数ペア:

[(1, 21586719), (3, 7195573), (7, 3083817), (11, 1962429), (17, 1269807), (21, 1027939), (23, 938553), (33, 654143), (51, 423269), (69, 312851), (77, 280347), (119, 181401), (161, 134079), (187, 115437), (231, 93449), (239, 90321), (253, 85323), (357, 60467), (391, 55209), (483, 44693), (561, 38479), (717, 30107), (759, 28441), (1173, 18403), (1309, 16491), (1673, 12903), (1771, 12189), (2629, 8211), (2737, 7887), (3927, 5497), (4063, 5313), (4301, 5019)]