638880374

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{389}}^1\times {\mathrm{74653}}^1$

素因数の和:75055

約数の個数: 16

約数和(自身を含む): 1048142160

約数和(自身を除く): 409261786

約数列:

[1, 2, 11, 22, 389, 778, 4279, 8558, 74653, 149306, 821183, 1642366, 29040017, 58080034, 319440187, 638880374]

約数ペア:

[(1, 638880374), (2, 319440187), (11, 58080034), (22, 29040017), (389, 1642366), (778, 821183), (4279, 149306), (8558, 74653)]