20621223

素因数分解:

$3^8\times 7^1\times {\mathrm{449}}^1$

素因数の和:480

約数の個数: 36

約数和(自身を含む): 35427600

約数和(自身を除く): 14806377

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 449, 567, 729, 1347, 1701, 2187, 3143, 4041, 5103, 6561, 9429, 12123, 15309, 28287, 36369, 45927, 84861, 109107, 254583, 327321, 763749, 981963, 2291247, 2945889, 6873741, 20621223]

約数ペア:

[(1, 20621223), (3, 6873741), (7, 2945889), (9, 2291247), (21, 981963), (27, 763749), (63, 327321), (81, 254583), (189, 109107), (243, 84861), (449, 45927), (567, 36369), (729, 28287), (1347, 15309), (1701, 12123), (2187, 9429), (3143, 6561), (4041, 5103)]