20199221

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{17923}}^1$

素因数の和:17960

約数の個数: 12

約数和(自身を含む): 24520032

約数和(自身を除く): 4320811

約数列:

[1, 7, 23, 49, 161, 1127, 17923, 125461, 412229, 878227, 2885603, 20199221]

約数ペア:

[(1, 20199221), (7, 2885603), (23, 878227), (49, 412229), (161, 125461), (1127, 17923)]