21037797

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:202

約数の個数: 48

約数和(自身を含む): 34909056

約数和(自身を除く): 13871259

約数列:

[1, 3, 9, 11, 33, 41, 71, 73, 99, 123, 213, 219, 369, 451, 639, 657, 781, 803, 1353, 2343, 2409, 2911, 2993, 4059, 5183, 7029, 7227, 8733, 8979, 15549, 26199, 26937, 32021, 32923, 46647, 57013, 96063, 98769, 171039, 212503, 288189, 296307, 513117, 637509, 1912527, 2337533, 7012599, 21037797]

約数ペア:

[(1, 21037797), (3, 7012599), (9, 2337533), (11, 1912527), (33, 637509), (41, 513117), (71, 296307), (73, 288189), (99, 212503), (123, 171039), (213, 98769), (219, 96063), (369, 57013), (451, 46647), (639, 32923), (657, 32021), (781, 26937), (803, 26199), (1353, 15549), (2343, 8979), (2409, 8733), (2911, 7227), (2993, 7029), (4059, 5183)]