21813988

素因数分解:

$2^2\times 7^1\times {\mathrm{353}}^1\times {\mathrm{2207}}^1$

素因数の和:2571

約数の個数: 24

約数和(自身を含む): 43771392

約数和(自身を除く): 21957404

約数列:

[1, 2, 4, 7, 14, 28, 353, 706, 1412, 2207, 2471, 4414, 4942, 8828, 9884, 15449, 30898, 61796, 779071, 1558142, 3116284, 5453497, 10906994, 21813988]

約数ペア:

[(1, 21813988), (2, 10906994), (4, 5453497), (7, 3116284), (14, 1558142), (28, 779071), (353, 61796), (706, 30898), (1412, 15449), (2207, 9884), (2471, 8828), (4414, 4942)]