21499856

素因数分解:

$2^4\times 7^1\times {\mathrm{97}}^1\times {\mathrm{1979}}^1$

素因数の和:2091

約数の個数: 40

約数和(自身を含む): 48121920

約数和(自身を除く): 26622064

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 97, 112, 194, 388, 679, 776, 1358, 1552, 1979, 2716, 3958, 5432, 7916, 10864, 13853, 15832, 27706, 31664, 55412, 110824, 191963, 221648, 383926, 767852, 1343741, 1535704, 2687482, 3071408, 5374964, 10749928, 21499856]

約数ペア:

[(1, 21499856), (2, 10749928), (4, 5374964), (7, 3071408), (8, 2687482), (14, 1535704), (16, 1343741), (28, 767852), (56, 383926), (97, 221648), (112, 191963), (194, 110824), (388, 55412), (679, 31664), (776, 27706), (1358, 15832), (1552, 13853), (1979, 10864), (2716, 7916), (3958, 5432)]