21519603

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{283}}^1$

素因数の和:384

約数の個数: 48

約数和(自身を含む): 38278656

約数和(自身を除く): 16759053

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 71, 119, 153, 213, 283, 357, 497, 639, 849, 1071, 1207, 1491, 1981, 2547, 3621, 4473, 4811, 5943, 8449, 10863, 14433, 17829, 20093, 25347, 33677, 43299, 60279, 76041, 101031, 140651, 180837, 303093, 341581, 421953, 1024743, 1265859, 2391067, 3074229, 7173201, 21519603]

約数ペア:

[(1, 21519603), (3, 7173201), (7, 3074229), (9, 2391067), (17, 1265859), (21, 1024743), (51, 421953), (63, 341581), (71, 303093), (119, 180837), (153, 140651), (213, 101031), (283, 76041), (357, 60279), (497, 43299), (639, 33677), (849, 25347), (1071, 20093), (1207, 17829), (1491, 14433), (1981, 10863), (2547, 8449), (3621, 5943), (4473, 4811)]