20905120

素因数分解:

$2^5\times 5^1\times {\mathrm{130657}}^1$

素因数の和:130672

約数の個数: 24

約数和(自身を含む): 49388724

約数和(自身を除く): 28483604

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 130657, 261314, 522628, 653285, 1045256, 1306570, 2090512, 2613140, 4181024, 5226280, 10452560, 20905120]

約数ペア:

[(1, 20905120), (2, 10452560), (4, 5226280), (5, 4181024), (8, 2613140), (10, 2090512), (16, 1306570), (20, 1045256), (32, 653285), (40, 522628), (80, 261314), (160, 130657)]