20872628

素因数分解:

$2^2\times 7^2\times {\mathrm{109}}^1\times {\mathrm{977}}^1$

素因数の和:1104

約数の個数: 36

約数和(自身を含む): 42924420

約数和(自身を除く): 22051792

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 109, 196, 218, 436, 763, 977, 1526, 1954, 3052, 3908, 5341, 6839, 10682, 13678, 21364, 27356, 47873, 95746, 106493, 191492, 212986, 425972, 745451, 1490902, 2981804, 5218157, 10436314, 20872628]

約数ペア:

[(1, 20872628), (2, 10436314), (4, 5218157), (7, 2981804), (14, 1490902), (28, 745451), (49, 425972), (98, 212986), (109, 191492), (196, 106493), (218, 95746), (436, 47873), (763, 27356), (977, 21364), (1526, 13678), (1954, 10682), (3052, 6839), (3908, 5341)]