21513928

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{141539}}^1$

素因数の和:141564

約数の個数: 16

約数和(自身を含む): 42462000

約数和(自身を除く): 20948072

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 141539, 283078, 566156, 1132312, 2689241, 5378482, 10756964, 21513928]

約数ペア:

[(1, 21513928), (2, 10756964), (4, 5378482), (8, 2689241), (19, 1132312), (38, 566156), (76, 283078), (152, 141539)]