17987851

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{139}}^2$

素因数の和:311

約数の個数: 18

約数和(自身を含む): 22185540

約数和(自身を除く): 4197689

約数列:

[1, 7, 19, 49, 133, 139, 931, 973, 2641, 6811, 18487, 19321, 129409, 135247, 367099, 946729, 2569693, 17987851]

約数ペア:

[(1, 17987851), (7, 2569693), (19, 946729), (49, 367099), (133, 135247), (139, 129409), (931, 19321), (973, 18487), (2641, 6811)]