20509749

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{307}}^1\times {\mathrm{571}}^1$

素因数の和:897

約数の個数: 24

約数和(自身を含む): 32064032

約数和(自身を除く): 11554283

約数列:

[1, 3, 9, 13, 39, 117, 307, 571, 921, 1713, 2763, 3991, 5139, 7423, 11973, 22269, 35919, 66807, 175297, 525891, 1577673, 2278861, 6836583, 20509749]

約数ペア:

[(1, 20509749), (3, 6836583), (9, 2278861), (13, 1577673), (39, 525891), (117, 175297), (307, 66807), (571, 35919), (921, 22269), (1713, 11973), (2763, 7423), (3991, 5139)]