21000872

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{131}}^1\times {\mathrm{691}}^1$

素因数の和:857

約数の個数: 32

約数和(自身を含む): 41104800

約数和(自身を除く): 20103928

約数列:

[1, 2, 4, 8, 29, 58, 116, 131, 232, 262, 524, 691, 1048, 1382, 2764, 3799, 5528, 7598, 15196, 20039, 30392, 40078, 80156, 90521, 160312, 181042, 362084, 724168, 2625109, 5250218, 10500436, 21000872]

約数ペア:

[(1, 21000872), (2, 10500436), (4, 5250218), (8, 2625109), (29, 724168), (58, 362084), (116, 181042), (131, 160312), (232, 90521), (262, 80156), (524, 40078), (691, 30392), (1048, 20039), (1382, 15196), (2764, 7598), (3799, 5528)]