21236765

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{3823}}^1$

素因数の和:3940

約数の個数: 16

約数和(自身を含む): 28083456

約数和(自身を除く): 6846691

約数列:

[1, 5, 11, 55, 101, 505, 1111, 3823, 5555, 19115, 42053, 210265, 386123, 1930615, 4247353, 21236765]

約数ペア:

[(1, 21236765), (5, 4247353), (11, 1930615), (55, 386123), (101, 210265), (505, 42053), (1111, 19115), (3823, 5555)]