21494924

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{89}}^1\times {\mathrm{499}}^1$

素因数の和:614

約数の個数: 36

約数和(自身を含む): 41895000

約数和(自身を除く): 20400076

約数列:

[1, 2, 4, 11, 22, 44, 89, 121, 178, 242, 356, 484, 499, 979, 998, 1958, 1996, 3916, 5489, 10769, 10978, 21538, 21956, 43076, 44411, 60379, 88822, 120758, 177644, 241516, 488521, 977042, 1954084, 5373731, 10747462, 21494924]

約数ペア:

[(1, 21494924), (2, 10747462), (4, 5373731), (11, 1954084), (22, 977042), (44, 488521), (89, 241516), (121, 177644), (178, 120758), (242, 88822), (356, 60379), (484, 44411), (499, 43076), (979, 21956), (998, 21538), (1958, 10978), (1996, 10769), (3916, 5489)]