20900817

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^2\times {\mathrm{919}}^1$

素因数の和:970

約数の個数: 36

約数和(自身を含む): 36454080

約数和(自身を除く): 15553263

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 361, 399, 919, 1083, 1197, 2527, 2757, 3249, 6433, 7581, 8271, 17461, 19299, 22743, 52383, 57897, 122227, 157149, 331759, 366681, 995277, 1100043, 2322313, 2985831, 6966939, 20900817]

約数ペア:

[(1, 20900817), (3, 6966939), (7, 2985831), (9, 2322313), (19, 1100043), (21, 995277), (57, 366681), (63, 331759), (133, 157149), (171, 122227), (361, 57897), (399, 52383), (919, 22743), (1083, 19299), (1197, 17461), (2527, 8271), (2757, 7581), (3249, 6433)]