20810825

素因数分解:

$5^2\times 7^1\times {\mathrm{109}}^1\times {\mathrm{1091}}^1$

素因数の和:1217

約数の個数: 24

約数和(自身を含む): 29789760

約数和(自身を除く): 8978935

約数列:

[1, 5, 7, 25, 35, 109, 175, 545, 763, 1091, 2725, 3815, 5455, 7637, 19075, 27275, 38185, 118919, 190925, 594595, 832433, 2972975, 4162165, 20810825]

約数ペア:

[(1, 20810825), (5, 4162165), (7, 2972975), (25, 832433), (35, 594595), (109, 190925), (175, 118919), (545, 38185), (763, 27275), (1091, 19075), (2725, 7637), (3815, 5455)]