21254330

素因数分解:

$2^1\times 5^1\times {\mathrm{197}}^1\times {\mathrm{10789}}^1$

素因数の和:10993

約数の個数: 16

約数和(自身を含む): 38455560

約数和(自身を除く): 17201230

約数列:

[1, 2, 5, 10, 197, 394, 985, 1970, 10789, 21578, 53945, 107890, 2125433, 4250866, 10627165, 21254330]

約数ペア:

[(1, 21254330), (2, 10627165), (5, 4250866), (10, 2125433), (197, 107890), (394, 53945), (985, 21578), (1970, 10789)]