19742905

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43391}}^1$

素因数の和:43416

約数の個数: 16

約数和(自身を含む): 29159424

約数和(自身を除く): 9416519

約数列:

[1, 5, 7, 13, 35, 65, 91, 455, 43391, 216955, 303737, 564083, 1518685, 2820415, 3948581, 19742905]

約数ペア:

[(1, 19742905), (5, 3948581), (7, 2820415), (13, 1518685), (35, 564083), (65, 303737), (91, 216955), (455, 43391)]