21406924

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{9929}}^1$

素因数の和:9958

約数の個数: 36

約数和(自身を含む): 47544840

約数和(自身を除く): 26137916

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 49, 77, 98, 154, 196, 308, 539, 1078, 2156, 9929, 19858, 39716, 69503, 109219, 139006, 218438, 278012, 436876, 486521, 764533, 973042, 1529066, 1946084, 3058132, 5351731, 10703462, 21406924]

約数ペア:

[(1, 21406924), (2, 10703462), (4, 5351731), (7, 3058132), (11, 1946084), (14, 1529066), (22, 973042), (28, 764533), (44, 486521), (49, 436876), (77, 278012), (98, 218438), (154, 139006), (196, 109219), (308, 69503), (539, 39716), (1078, 19858), (2156, 9929)]