257942321

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{307}}^1\times {\mathrm{1319}}^1$

素因数の和:1653

約数の個数: 24

約数和(自身を含む): 324434880

約数和(自身を除く): 66492559

約数列:

[1, 7, 13, 49, 91, 307, 637, 1319, 2149, 3991, 9233, 15043, 17147, 27937, 64631, 120029, 195559, 404933, 840203, 2834531, 5264129, 19841717, 36848903, 257942321]

約数ペア:

[(1, 257942321), (7, 36848903), (13, 19841717), (49, 5264129), (91, 2834531), (307, 840203), (637, 404933), (1319, 195559), (2149, 120029), (3991, 64631), (9233, 27937), (15043, 17147)]