21163280

素因数分解:

$2^4\times 5^1\times {\mathrm{127}}^1\times {\mathrm{2083}}^1$

素因数の和:2223

約数の個数: 40

約数和(自身を含む): 49615872

約数和(自身を除く): 28452592

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 127, 254, 508, 635, 1016, 1270, 2032, 2083, 2540, 4166, 5080, 8332, 10160, 10415, 16664, 20830, 33328, 41660, 83320, 166640, 264541, 529082, 1058164, 1322705, 2116328, 2645410, 4232656, 5290820, 10581640, 21163280]

約数ペア:

[(1, 21163280), (2, 10581640), (4, 5290820), (5, 4232656), (8, 2645410), (10, 2116328), (16, 1322705), (20, 1058164), (40, 529082), (80, 264541), (127, 166640), (254, 83320), (508, 41660), (635, 33328), (1016, 20830), (1270, 16664), (2032, 10415), (2083, 10160), (2540, 8332), (4166, 5080)]