20404209

素因数分解:

$3^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{6521}}^1$

素因数の和:6680

約数の個数: 16

約数和(自身を含む): 31305600

約数和(自身を除く): 10901391

約数列:

[1, 3, 7, 21, 149, 447, 1043, 3129, 6521, 19563, 45647, 136941, 971629, 2914887, 6801403, 20404209]

約数ペア:

[(1, 20404209), (3, 6801403), (7, 2914887), (21, 971629), (149, 136941), (447, 45647), (1043, 19563), (3129, 6521)]