20505275

素因数分解:

$5^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{881}}^1$

素因数の和:924

約数の個数: 36

約数和(自身を含む): 31169880

約数和(自身を除く): 10664605

約数列:

[1, 5, 7, 19, 25, 35, 49, 95, 133, 175, 245, 475, 665, 881, 931, 1225, 3325, 4405, 4655, 6167, 16739, 22025, 23275, 30835, 43169, 83695, 117173, 154175, 215845, 418475, 585865, 820211, 1079225, 2929325, 4101055, 20505275]

約数ペア:

[(1, 20505275), (5, 4101055), (7, 2929325), (19, 1079225), (25, 820211), (35, 585865), (49, 418475), (95, 215845), (133, 154175), (175, 117173), (245, 83695), (475, 43169), (665, 30835), (881, 23275), (931, 22025), (1225, 16739), (3325, 6167), (4405, 4655)]