21085743

素因数分解:

$3^1\times 7^1\times {\mathrm{821}}^1\times {\mathrm{1223}}^1$

素因数の和:2054

約数の個数: 16

約数和(自身を含む): 32196096

約数和(自身を除く): 11110353

約数列:

[1, 3, 7, 21, 821, 1223, 2463, 3669, 5747, 8561, 17241, 25683, 1004083, 3012249, 7028581, 21085743]

約数ペア:

[(1, 21085743), (3, 7028581), (7, 3012249), (21, 1004083), (821, 25683), (1223, 17241), (2463, 8561), (3669, 5747)]