28390090

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{28109}}^1$

素因数の和:28217

約数の個数: 16

約数和(自身を含む): 51609960

約数和(自身を除く): 23219870

約数列:

[1, 2, 5, 10, 101, 202, 505, 1010, 28109, 56218, 140545, 281090, 2839009, 5678018, 14195045, 28390090]

約数ペア:

[(1, 28390090), (2, 14195045), (5, 5678018), (10, 2839009), (101, 281090), (202, 140545), (505, 56218), (1010, 28109)]