21120410

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{1087}}^1$

素因数の和:1190

約数の個数: 32

約数和(自身を含む): 39951360

約数和(自身を除く): 18830950

約数列:

[1, 2, 5, 10, 29, 58, 67, 134, 145, 290, 335, 670, 1087, 1943, 2174, 3886, 5435, 9715, 10870, 19430, 31523, 63046, 72829, 145658, 157615, 315230, 364145, 728290, 2112041, 4224082, 10560205, 21120410]

約数ペア:

[(1, 21120410), (2, 10560205), (5, 4224082), (10, 2112041), (29, 728290), (58, 364145), (67, 315230), (134, 157615), (145, 145658), (290, 72829), (335, 63046), (670, 31523), (1087, 19430), (1943, 10870), (2174, 9715), (3886, 5435)]