31307031

素因数分解:

$3^2\times 7^2\times {\mathrm{70991}}^1$

素因数の和:71011

約数の個数: 18

約数和(自身を含む): 52605072

約数和(自身を除く): 21298041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 70991, 212973, 496937, 638919, 1490811, 3478559, 4472433, 10435677, 31307031]

約数ペア:

[(1, 31307031), (3, 10435677), (7, 4472433), (9, 3478559), (21, 1490811), (49, 638919), (63, 496937), (147, 212973), (441, 70991)]