12905840

素因数分解:

$2^4\times 5^1\times {\mathrm{161323}}^1$

素因数の和:161336

約数の個数: 20

約数和(自身を含む): 30006264

約数和(自身を除く): 17100424

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 161323, 322646, 645292, 806615, 1290584, 1613230, 2581168, 3226460, 6452920, 12905840]

約数ペア:

[(1, 12905840), (2, 6452920), (4, 3226460), (5, 2581168), (8, 1613230), (10, 1290584), (16, 806615), (20, 645292), (40, 322646), (80, 161323)]