20287421

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{283}}^1$

素因数の和:334

約数の個数: 32

約数和(自身を含む): 27264000

約数和(自身を除く): 6976579

約数列:

[1, 7, 11, 19, 49, 77, 133, 209, 283, 343, 539, 931, 1463, 1981, 3113, 3773, 5377, 6517, 10241, 13867, 21791, 37639, 59147, 71687, 97069, 152537, 263473, 414029, 1067759, 1844311, 2898203, 20287421]

約数ペア:

[(1, 20287421), (7, 2898203), (11, 1844311), (19, 1067759), (49, 414029), (77, 263473), (133, 152537), (209, 97069), (283, 71687), (343, 59147), (539, 37639), (931, 21791), (1463, 13867), (1981, 10241), (3113, 6517), (3773, 5377)]