20521864

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{3823}}^1$

素因数の和:3901

約数の個数: 32

約数和(自身を含む): 42675840

約数和(自身を除く): 22153976

約数列:

[1, 2, 4, 8, 11, 22, 44, 61, 88, 122, 244, 488, 671, 1342, 2684, 3823, 5368, 7646, 15292, 30584, 42053, 84106, 168212, 233203, 336424, 466406, 932812, 1865624, 2565233, 5130466, 10260932, 20521864]

約数ペア:

[(1, 20521864), (2, 10260932), (4, 5130466), (8, 2565233), (11, 1865624), (22, 932812), (44, 466406), (61, 336424), (88, 233203), (122, 168212), (244, 84106), (488, 42053), (671, 30584), (1342, 15292), (2684, 7646), (3823, 5368)]