19991946

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{256307}}^1$

素因数の和:256325

約数の個数: 16

約数和(自身を含む): 43059744

約数和(自身を除く): 23067798

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 256307, 512614, 768921, 1537842, 3331991, 6663982, 9995973, 19991946]

約数ペア:

[(1, 19991946), (2, 9995973), (3, 6663982), (6, 3331991), (13, 1537842), (26, 768921), (39, 512614), (78, 256307)]