20581148

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{181}}^1$

素因数の和:354

約数の個数: 48

約数和(自身を含む): 43051008

約数和(自身を除く): 22469860

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 124, 131, 181, 217, 262, 362, 434, 524, 724, 868, 917, 1267, 1834, 2534, 3668, 4061, 5068, 5611, 8122, 11222, 16244, 22444, 23711, 28427, 39277, 47422, 56854, 78554, 94844, 113708, 157108, 165977, 331954, 663908, 735041, 1470082, 2940164, 5145287, 10290574, 20581148]

約数ペア:

[(1, 20581148), (2, 10290574), (4, 5145287), (7, 2940164), (14, 1470082), (28, 735041), (31, 663908), (62, 331954), (124, 165977), (131, 157108), (181, 113708), (217, 94844), (262, 78554), (362, 56854), (434, 47422), (524, 39277), (724, 28427), (868, 23711), (917, 22444), (1267, 16244), (1834, 11222), (2534, 8122), (3668, 5611), (4061, 5068)]