18997495

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{3881}}^1$

素因数の和:3986

約数の個数: 16

約数和(自身を含む): 25155360

約数和(自身を除く): 6157865

約数列:

[1, 5, 11, 55, 89, 445, 979, 3881, 4895, 19405, 42691, 213455, 345409, 1727045, 3799499, 18997495]

約数ペア:

[(1, 18997495), (5, 3799499), (11, 1727045), (55, 345409), (89, 213455), (445, 42691), (979, 19405), (3881, 4895)]