19887556

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{2113}}^1$

素因数の和:2311

約数の個数: 24

約数和(自身を含む): 37705304

約数和(自身を除く): 17817748

約数列:

[1, 2, 4, 13, 26, 52, 181, 362, 724, 2113, 2353, 4226, 4706, 8452, 9412, 27469, 54938, 109876, 382453, 764906, 1529812, 4971889, 9943778, 19887556]

約数ペア:

[(1, 19887556), (2, 9943778), (4, 4971889), (13, 1529812), (26, 764906), (52, 382453), (181, 109876), (362, 54938), (724, 27469), (2113, 9412), (2353, 8452), (4226, 4706)]