21511756

素因数分解:

$2^2\times 7^1\times {\mathrm{103}}^1\times {\mathrm{7459}}^1$

素因数の和:7573

約数の個数: 24

約数和(自身を含む): 43447040

約数和(自身を除く): 21935284

約数列:

[1, 2, 4, 7, 14, 28, 103, 206, 412, 721, 1442, 2884, 7459, 14918, 29836, 52213, 104426, 208852, 768277, 1536554, 3073108, 5377939, 10755878, 21511756]

約数ペア:

[(1, 21511756), (2, 10755878), (4, 5377939), (7, 3073108), (14, 1536554), (28, 768277), (103, 208852), (206, 104426), (412, 52213), (721, 29836), (1442, 14918), (2884, 7459)]