20011775

素因数分解:

$5^2\times 7^1\times {\mathrm{173}}^1\times {\mathrm{661}}^1$

素因数の和:851

約数の個数: 24

約数和(自身を含む): 28566624

約数和(自身を除く): 8554849

約数列:

[1, 5, 7, 25, 35, 173, 175, 661, 865, 1211, 3305, 4325, 4627, 6055, 16525, 23135, 30275, 114353, 115675, 571765, 800471, 2858825, 4002355, 20011775]

約数ペア:

[(1, 20011775), (5, 4002355), (7, 2858825), (25, 800471), (35, 571765), (173, 115675), (175, 114353), (661, 30275), (865, 23135), (1211, 16525), (3305, 6055), (4325, 4627)]