21393708

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{257}}^1\times {\mathrm{991}}^1$

素因数の和:1262

約数の個数: 48

約数和(自身を含む): 57329664

約数和(自身を除く): 35935956

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 257, 514, 771, 991, 1028, 1542, 1799, 1982, 2973, 3084, 3598, 3964, 5397, 5946, 6937, 7196, 10794, 11892, 13874, 20811, 21588, 27748, 41622, 83244, 254687, 509374, 764061, 1018748, 1528122, 1782809, 3056244, 3565618, 5348427, 7131236, 10696854, 21393708]

約数ペア:

[(1, 21393708), (2, 10696854), (3, 7131236), (4, 5348427), (6, 3565618), (7, 3056244), (12, 1782809), (14, 1528122), (21, 1018748), (28, 764061), (42, 509374), (84, 254687), (257, 83244), (514, 41622), (771, 27748), (991, 21588), (1028, 20811), (1542, 13874), (1799, 11892), (1982, 10794), (2973, 7196), (3084, 6937), (3598, 5946), (3964, 5397)]