81583131

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{1471}}^1$

素因数の和:1639

約数の個数: 32

約数和(自身を含む): 131891200

約数和(自身を除く): 50308069

約数列:

[1, 3, 7, 19, 21, 57, 133, 139, 399, 417, 973, 1471, 2641, 2919, 4413, 7923, 10297, 18487, 27949, 30891, 55461, 83847, 195643, 204469, 586929, 613407, 1431283, 3884911, 4293849, 11654733, 27194377, 81583131]

約数ペア:

[(1, 81583131), (3, 27194377), (7, 11654733), (19, 4293849), (21, 3884911), (57, 1431283), (133, 613407), (139, 586929), (399, 204469), (417, 195643), (973, 83847), (1471, 55461), (2641, 30891), (2919, 27949), (4413, 18487), (7923, 10297)]