21691390

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{309877}}^1$

素因数の和:309891

約数の個数: 16

約数和(自身を含む): 44622432

約数和(自身を除く): 22931042

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 309877, 619754, 1549385, 2169139, 3098770, 4338278, 10845695, 21691390]

約数ペア:

[(1, 21691390), (2, 10845695), (5, 4338278), (7, 3098770), (10, 2169139), (14, 1549385), (35, 619754), (70, 309877)]