19661240

素因数分解:

$2^3\times 5^1\times {\mathrm{491531}}^1$

素因数の和:491542

約数の個数: 16

約数和(自身を含む): 44237880

約数和(自身を除く): 24576640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491531, 983062, 1966124, 2457655, 3932248, 4915310, 9830620, 19661240]

約数ペア:

[(1, 19661240), (2, 9830620), (4, 4915310), (5, 3932248), (8, 2457655), (10, 1966124), (20, 983062), (40, 491531)]