20578228

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1$

素因数の和:145

約数の個数: 72

約数和(自身を含む): 43637832

約数和(自身を除く): 23059604

約数列:

[1, 2, 4, 11, 17, 22, 34, 41, 44, 61, 68, 82, 121, 122, 164, 187, 242, 244, 374, 451, 484, 671, 697, 748, 902, 1037, 1342, 1394, 1804, 2057, 2074, 2501, 2684, 2788, 4114, 4148, 4961, 5002, 7381, 7667, 8228, 9922, 10004, 11407, 14762, 15334, 19844, 22814, 27511, 29524, 30668, 42517, 45628, 55022, 84337, 85034, 110044, 125477, 168674, 170068, 250954, 302621, 337348, 467687, 501908, 605242, 935374, 1210484, 1870748, 5144557, 10289114, 20578228]

約数ペア:

[(1, 20578228), (2, 10289114), (4, 5144557), (11, 1870748), (17, 1210484), (22, 935374), (34, 605242), (41, 501908), (44, 467687), (61, 337348), (68, 302621), (82, 250954), (121, 170068), (122, 168674), (164, 125477), (187, 110044), (242, 85034), (244, 84337), (374, 55022), (451, 45628), (484, 42517), (671, 30668), (697, 29524), (748, 27511), (902, 22814), (1037, 19844), (1342, 15334), (1394, 14762), (1804, 11407), (2057, 10004), (2074, 9922), (2501, 8228), (2684, 7667), (2788, 7381), (4114, 5002), (4148, 4961)]