21028245

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{271}}^1\times {\mathrm{739}}^1$

素因数の和:1025

約数の個数: 32

約数和(自身を含む): 38645760

約数和(自身を除く): 17617515

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 271, 739, 813, 1355, 1897, 2217, 3695, 4065, 5173, 5691, 9485, 11085, 15519, 25865, 28455, 77595, 200269, 600807, 1001345, 1401883, 3004035, 4205649, 7009415, 21028245]

約数ペア:

[(1, 21028245), (3, 7009415), (5, 4205649), (7, 3004035), (15, 1401883), (21, 1001345), (35, 600807), (105, 200269), (271, 77595), (739, 28455), (813, 25865), (1355, 15519), (1897, 11085), (2217, 9485), (3695, 5691), (4065, 5173)]