21204976

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{1051}}^1$

素因数の和:1169

約数の個数: 40

約数和(自身を含む): 44743664

約数和(自身を除く): 23538688

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 97, 104, 194, 208, 388, 776, 1051, 1261, 1552, 2102, 2522, 4204, 5044, 8408, 10088, 13663, 16816, 20176, 27326, 54652, 101947, 109304, 203894, 218608, 407788, 815576, 1325311, 1631152, 2650622, 5301244, 10602488, 21204976]

約数ペア:

[(1, 21204976), (2, 10602488), (4, 5301244), (8, 2650622), (13, 1631152), (16, 1325311), (26, 815576), (52, 407788), (97, 218608), (104, 203894), (194, 109304), (208, 101947), (388, 54652), (776, 27326), (1051, 20176), (1261, 16816), (1552, 13663), (2102, 10088), (2522, 8408), (4204, 5044)]