21557668

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{97}}^1\times {\mathrm{5051}}^1$

素因数の和:5163

約数の個数: 24

約数和(自身を含む): 41588064

約数和(自身を除く): 20030396

約数列:

[1, 2, 4, 11, 22, 44, 97, 194, 388, 1067, 2134, 4268, 5051, 10102, 20204, 55561, 111122, 222244, 489947, 979894, 1959788, 5389417, 10778834, 21557668]

約数ペア:

[(1, 21557668), (2, 10778834), (4, 5389417), (11, 1959788), (22, 979894), (44, 489947), (97, 222244), (194, 111122), (388, 55561), (1067, 20204), (2134, 10102), (4268, 5051)]