20574169

素因数分解:

$7^4\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1$

素因数の和:99

約数の個数: 40

約数和(自身を含む): 28234080

約数和(自身を除く): 7659911

約数列:

[1, 7, 11, 19, 41, 49, 77, 133, 209, 287, 343, 451, 539, 779, 931, 1463, 2009, 2401, 3157, 3773, 5453, 6517, 8569, 10241, 14063, 22099, 26411, 38171, 45619, 59983, 71687, 98441, 154693, 267197, 419881, 501809, 1082851, 1870379, 2939167, 20574169]

約数ペア:

[(1, 20574169), (7, 2939167), (11, 1870379), (19, 1082851), (41, 501809), (49, 419881), (77, 267197), (133, 154693), (209, 98441), (287, 71687), (343, 59983), (451, 45619), (539, 38171), (779, 26411), (931, 22099), (1463, 14063), (2009, 10241), (2401, 8569), (3157, 6517), (3773, 5453)]