638505

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{2027}}^1$

素因数の和:2045

約数の個数: 24

約数和(自身を含む): 1265472

約数和(自身を除く): 626967

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 2027, 6081, 10135, 14189, 18243, 30405, 42567, 70945, 91215, 127701, 212835, 638505]

約数ペア:

[(1, 638505), (3, 212835), (5, 127701), (7, 91215), (9, 70945), (15, 42567), (21, 30405), (35, 18243), (45, 14189), (63, 10135), (105, 6081), (315, 2027)]