1981616

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1361}}^1$

素因数の和:1389

約数の個数: 40

約数和(自身を含む): 4728864

約数和(自身を除く): 2747248

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 91, 104, 112, 182, 208, 364, 728, 1361, 1456, 2722, 5444, 9527, 10888, 17693, 19054, 21776, 35386, 38108, 70772, 76216, 123851, 141544, 152432, 247702, 283088, 495404, 990808, 1981616]

約数ペア:

[(1, 1981616), (2, 990808), (4, 495404), (7, 283088), (8, 247702), (13, 152432), (14, 141544), (16, 123851), (26, 76216), (28, 70772), (52, 38108), (56, 35386), (91, 21776), (104, 19054), (112, 17693), (182, 10888), (208, 9527), (364, 5444), (728, 2722), (1361, 1456)]