20686564

素因数分解:

$2^2\times {\mathrm{61}}^1\times {\mathrm{149}}^1\times {\mathrm{569}}^1$

素因数の和:783

約数の個数: 24

約数和(自身を含む): 37107000

約数和(自身を除く): 16420436

約数列:

[1, 2, 4, 61, 122, 149, 244, 298, 569, 596, 1138, 2276, 9089, 18178, 34709, 36356, 69418, 84781, 138836, 169562, 339124, 5171641, 10343282, 20686564]

約数ペア:

[(1, 20686564), (2, 10343282), (4, 5171641), (61, 339124), (122, 169562), (149, 138836), (244, 84781), (298, 69418), (569, 36356), (596, 34709), (1138, 18178), (2276, 9089)]