261287688

素因数分解:

$2^3\times 3^1\times {\mathrm{17}}^1\times {\mathrm{640411}}^1$

素因数の和:640437

約数の個数: 32

約数和(自身を含む): 691644960

約数和(自身を除く): 430357272

約数列:

[1, 2, 3, 4, 6, 8, 12, 17, 24, 34, 51, 68, 102, 136, 204, 408, 640411, 1280822, 1921233, 2561644, 3842466, 5123288, 7684932, 10886987, 15369864, 21773974, 32660961, 43547948, 65321922, 87095896, 130643844, 261287688]

約数ペア:

[(1, 261287688), (2, 130643844), (3, 87095896), (4, 65321922), (6, 43547948), (8, 32660961), (12, 21773974), (17, 15369864), (24, 10886987), (34, 7684932), (51, 5123288), (68, 3842466), (102, 2561644), (136, 1921233), (204, 1280822), (408, 640411)]