12906640

素因数分解:

$2^4\times 5^1\times {\mathrm{161333}}^1$

素因数の和:161346

約数の個数: 20

約数和(自身を含む): 30008124

約数和(自身を除く): 17101484

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 161333, 322666, 645332, 806665, 1290664, 1613330, 2581328, 3226660, 6453320, 12906640]

約数ペア:

[(1, 12906640), (2, 6453320), (4, 3226660), (5, 2581328), (8, 1613330), (10, 1290664), (16, 806665), (20, 645332), (40, 322666), (80, 161333)]