19871505

素因数分解:

$3^2\times 5^1\times {\mathrm{107}}^1\times {\mathrm{4127}}^1$

素因数の和:4245

約数の個数: 24

約数和(自身を含む): 34774272

約数和(自身を除く): 14902767

約数列:

[1, 3, 5, 9, 15, 45, 107, 321, 535, 963, 1605, 4127, 4815, 12381, 20635, 37143, 61905, 185715, 441589, 1324767, 2207945, 3974301, 6623835, 19871505]

約数ペア:

[(1, 19871505), (3, 6623835), (5, 3974301), (9, 2207945), (15, 1324767), (45, 441589), (107, 185715), (321, 61905), (535, 37143), (963, 20635), (1605, 12381), (4127, 4815)]