20712916

素因数分解:

$2^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{181}}^1$

素因数の和:320

約数の個数: 48

約数和(自身を含む): 42969472

約数和(自身を除く): 22256556

約数列:

[1, 2, 4, 7, 14, 28, 61, 67, 122, 134, 181, 244, 268, 362, 427, 469, 724, 854, 938, 1267, 1708, 1876, 2534, 4087, 5068, 8174, 11041, 12127, 16348, 22082, 24254, 28609, 44164, 48508, 57218, 77287, 84889, 114436, 154574, 169778, 309148, 339556, 739747, 1479494, 2958988, 5178229, 10356458, 20712916]

約数ペア:

[(1, 20712916), (2, 10356458), (4, 5178229), (7, 2958988), (14, 1479494), (28, 739747), (61, 339556), (67, 309148), (122, 169778), (134, 154574), (181, 114436), (244, 84889), (268, 77287), (362, 57218), (427, 48508), (469, 44164), (724, 28609), (854, 24254), (938, 22082), (1267, 16348), (1708, 12127), (1876, 11041), (2534, 8174), (4087, 5068)]