20806947

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{7027}}^1$

素因数の和:7087

約数の個数: 24

約数和(自身を含む): 35083776

約数和(自身を除く): 14276829

約数列:

[1, 3, 7, 9, 21, 47, 63, 141, 329, 423, 987, 2961, 7027, 21081, 49189, 63243, 147567, 330269, 442701, 990807, 2311883, 2972421, 6935649, 20806947]

約数ペア:

[(1, 20806947), (3, 6935649), (7, 2972421), (9, 2311883), (21, 990807), (47, 442701), (63, 330269), (141, 147567), (329, 63243), (423, 49189), (987, 21081), (2961, 7027)]