19810105

素因数分解:

$5^1\times 7^1\times {\mathrm{641}}^1\times {\mathrm{883}}^1$

素因数の和:1536

約数の個数: 16

約数和(自身を含む): 27241344

約数和(自身を除く): 7431239

約数列:

[1, 5, 7, 35, 641, 883, 3205, 4415, 4487, 6181, 22435, 30905, 566003, 2830015, 3962021, 19810105]

約数ペア:

[(1, 19810105), (5, 3962021), (7, 2830015), (35, 566003), (641, 30905), (883, 22435), (3205, 6181), (4415, 4487)]