20981757

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{367}}^1$

素因数の和:465

約数の個数: 32

約数和(自身を含む): 31795200

約数和(自身を除く): 10813443

約数列:

[1, 3, 17, 19, 51, 57, 59, 177, 323, 367, 969, 1003, 1101, 1121, 3009, 3363, 6239, 6973, 18717, 19057, 20919, 21653, 57171, 64959, 118541, 355623, 368101, 411407, 1104303, 1234221, 6993919, 20981757]

約数ペア:

[(1, 20981757), (3, 6993919), (17, 1234221), (19, 1104303), (51, 411407), (57, 368101), (59, 355623), (177, 118541), (323, 64959), (367, 57171), (969, 21653), (1003, 20919), (1101, 19057), (1121, 18717), (3009, 6973), (3363, 6239)]