19911976

素因数分解:

$2^3\times 7^1\times {\mathrm{355571}}^1$

素因数の和:355584

約数の個数: 16

約数和(自身を含む): 42668640

約数和(自身を除く): 22756664

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 355571, 711142, 1422284, 2488997, 2844568, 4977994, 9955988, 19911976]

約数ペア:

[(1, 19911976), (2, 9955988), (4, 4977994), (7, 2844568), (8, 2488997), (14, 1422284), (28, 711142), (56, 355571)]