20912045

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1873}}^1$

素因数の和:1925

約数の個数: 32

約数和(自身を含む): 32382720

約数和(自身を除く): 11470675

約数列:

[1, 5, 7, 11, 29, 35, 55, 77, 145, 203, 319, 385, 1015, 1595, 1873, 2233, 9365, 11165, 13111, 20603, 54317, 65555, 103015, 144221, 271585, 380219, 597487, 721105, 1901095, 2987435, 4182409, 20912045]

約数ペア:

[(1, 20912045), (5, 4182409), (7, 2987435), (11, 1901095), (29, 721105), (35, 597487), (55, 380219), (77, 271585), (145, 144221), (203, 103015), (319, 65555), (385, 54317), (1015, 20603), (1595, 13111), (1873, 11165), (2233, 9365)]