21890085

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{1279}}^1$

素因数の和:1457

約数の個数: 32

約数和(自身を含む): 40304640

約数和(自身を除く): 18414555

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 163, 489, 815, 1141, 1279, 2445, 3423, 3837, 5705, 6395, 8953, 17115, 19185, 26859, 44765, 134295, 208477, 625431, 1042385, 1459339, 3127155, 4378017, 7296695, 21890085]

約数ペア:

[(1, 21890085), (3, 7296695), (5, 4378017), (7, 3127155), (15, 1459339), (21, 1042385), (35, 625431), (105, 208477), (163, 134295), (489, 44765), (815, 26859), (1141, 19185), (1279, 17115), (2445, 8953), (3423, 6395), (3837, 5705)]