20644173

素因数分解:

$3^3\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:191

約数の個数: 48

約数和(自身を含む): 34473600

約数和(自身を除く): 13829427

約数列:

[1, 3, 9, 11, 27, 33, 71, 89, 99, 121, 213, 267, 297, 363, 639, 781, 801, 979, 1089, 1917, 2343, 2403, 2937, 3267, 6319, 7029, 8591, 8811, 10769, 18957, 21087, 25773, 26433, 32307, 56871, 69509, 77319, 96921, 170613, 208527, 231957, 290763, 625581, 764599, 1876743, 2293797, 6881391, 20644173]

約数ペア:

[(1, 20644173), (3, 6881391), (9, 2293797), (11, 1876743), (27, 764599), (33, 625581), (71, 290763), (89, 231957), (99, 208527), (121, 170613), (213, 96921), (267, 77319), (297, 69509), (363, 56871), (639, 32307), (781, 26433), (801, 25773), (979, 21087), (1089, 18957), (1917, 10769), (2343, 8811), (2403, 8591), (2937, 7029), (3267, 6319)]