21590020

素因数分解:

$2^2\times 5^1\times {\mathrm{439}}^1\times {\mathrm{2459}}^1$

素因数の和:2907

約数の個数: 24

約数和(自身を含む): 45460800

約数和(自身を除く): 23870780

約数列:

[1, 2, 4, 5, 10, 20, 439, 878, 1756, 2195, 2459, 4390, 4918, 8780, 9836, 12295, 24590, 49180, 1079501, 2159002, 4318004, 5397505, 10795010, 21590020]

約数ペア:

[(1, 21590020), (2, 10795010), (4, 5397505), (5, 4318004), (10, 2159002), (20, 1079501), (439, 49180), (878, 24590), (1756, 12295), (2195, 9836), (2459, 8780), (4390, 4918)]