21651981

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{17909}}^1$

素因数の和:17956

約数の個数: 16

約数和(自身を含む): 32094720

約数和(自身を除く): 10442739

約数列:

[1, 3, 13, 31, 39, 93, 403, 1209, 17909, 53727, 232817, 555179, 698451, 1665537, 7217327, 21651981]

約数ペア:

[(1, 21651981), (3, 7217327), (13, 1665537), (31, 698451), (39, 555179), (93, 232817), (403, 53727), (1209, 17909)]