21990808

素因数分解:

$2^3\times 7^2\times {\mathrm{56099}}^1$

素因数の和:56119

約数の個数: 24

約数和(自身を含む): 47965500

約数和(自身を除く): 25974692

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 196, 392, 56099, 112198, 224396, 392693, 448792, 785386, 1570772, 2748851, 3141544, 5497702, 10995404, 21990808]

約数ペア:

[(1, 21990808), (2, 10995404), (4, 5497702), (7, 3141544), (8, 2748851), (14, 1570772), (28, 785386), (49, 448792), (56, 392693), (98, 224396), (196, 112198), (392, 56099)]