21259756

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{20521}}^1$

素因数の和:20569

約数の個数: 24

約数和(自身を含む): 43670816

約数和(自身を除く): 22411060

約数列:

[1, 2, 4, 7, 14, 28, 37, 74, 148, 259, 518, 1036, 20521, 41042, 82084, 143647, 287294, 574588, 759277, 1518554, 3037108, 5314939, 10629878, 21259756]

約数ペア:

[(1, 21259756), (2, 10629878), (4, 5314939), (7, 3037108), (14, 1518554), (28, 759277), (37, 574588), (74, 287294), (148, 143647), (259, 82084), (518, 41042), (1036, 20521)]