28400660

素因数分解:

$2^2\times 5^1\times {\mathrm{421}}^1\times {\mathrm{3373}}^1$

素因数の和:3803

約数の個数: 24

約数和(自身を含む): 59800776

約数和(自身を除く): 31400116

約数列:

[1, 2, 4, 5, 10, 20, 421, 842, 1684, 2105, 3373, 4210, 6746, 8420, 13492, 16865, 33730, 67460, 1420033, 2840066, 5680132, 7100165, 14200330, 28400660]

約数ペア:

[(1, 28400660), (2, 14200330), (4, 7100165), (5, 5680132), (10, 2840066), (20, 1420033), (421, 67460), (842, 33730), (1684, 16865), (2105, 13492), (3373, 8420), (4210, 6746)]