21558955

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{3881}}^1$

素因数の和:3998

約数の個数: 16

約数和(自身を含む): 28509408

約数和(自身を除く): 6950453

約数列:

[1, 5, 11, 55, 101, 505, 1111, 3881, 5555, 19405, 42691, 213455, 391981, 1959905, 4311791, 21558955]

約数ペア:

[(1, 21558955), (5, 4311791), (11, 1959905), (55, 391981), (101, 213455), (505, 42691), (1111, 19405), (3881, 5555)]