20807479

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{379}}^1$

素因数の和:451

約数の個数: 32

約数和(自身を含む): 28016640

約数和(自身を除く): 7209161

約数列:

[1, 7, 11, 23, 31, 77, 161, 217, 253, 341, 379, 713, 1771, 2387, 2653, 4169, 4991, 7843, 8717, 11749, 29183, 54901, 61019, 82243, 95887, 129239, 270227, 671209, 904673, 1891589, 2972497, 20807479]

約数ペア:

[(1, 20807479), (7, 2972497), (11, 1891589), (23, 904673), (31, 671209), (77, 270227), (161, 129239), (217, 95887), (253, 82243), (341, 61019), (379, 54901), (713, 29183), (1771, 11749), (2387, 8717), (2653, 7843), (4169, 4991)]