21254205

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2851}}^1$

素因数の和:2937

約数の個数: 32

約数和(自身を含む): 39426048

約数和(自身を除く): 18171843

約数列:

[1, 3, 5, 7, 15, 21, 35, 71, 105, 213, 355, 497, 1065, 1491, 2485, 2851, 7455, 8553, 14255, 19957, 42765, 59871, 99785, 202421, 299355, 607263, 1012105, 1416947, 3036315, 4250841, 7084735, 21254205]

約数ペア:

[(1, 21254205), (3, 7084735), (5, 4250841), (7, 3036315), (15, 1416947), (21, 1012105), (35, 607263), (71, 299355), (105, 202421), (213, 99785), (355, 59871), (497, 42765), (1065, 19957), (1491, 14255), (2485, 8553), (2851, 7455)]