20980904

素因数分解:

$2^3\times 7^1\times {\mathrm{43}}^1\times {\mathrm{8713}}^1$

素因数の和:8769

約数の個数: 32

約数和(自身を含む): 46009920

約数和(自身を除く): 25029016

約数列:

[1, 2, 4, 7, 8, 14, 28, 43, 56, 86, 172, 301, 344, 602, 1204, 2408, 8713, 17426, 34852, 60991, 69704, 121982, 243964, 374659, 487928, 749318, 1498636, 2622613, 2997272, 5245226, 10490452, 20980904]

約数ペア:

[(1, 20980904), (2, 10490452), (4, 5245226), (7, 2997272), (8, 2622613), (14, 1498636), (28, 749318), (43, 487928), (56, 374659), (86, 243964), (172, 121982), (301, 69704), (344, 60991), (602, 34852), (1204, 17426), (2408, 8713)]