21426741

素因数分解:

$3^3\times 7^1\times {\mathrm{73}}^1\times {\mathrm{1553}}^1$

素因数の和:1642

約数の個数: 32

約数和(自身を含む): 36798720

約数和(自身を除く): 15371979

約数列:

[1, 3, 7, 9, 21, 27, 63, 73, 189, 219, 511, 657, 1533, 1553, 1971, 4599, 4659, 10871, 13797, 13977, 32613, 41931, 97839, 113369, 293517, 340107, 793583, 1020321, 2380749, 3060963, 7142247, 21426741]

約数ペア:

[(1, 21426741), (3, 7142247), (7, 3060963), (9, 2380749), (21, 1020321), (27, 793583), (63, 340107), (73, 293517), (189, 113369), (219, 97839), (511, 41931), (657, 32613), (1533, 13977), (1553, 13797), (1971, 10871), (4599, 4659)]