20709171

素因数分解:

$3^2\times 7^1\times {\mathrm{113}}^1\times {\mathrm{2909}}^1$

素因数の和:3035

約数の個数: 24

約数和(自身を含む): 34500960

約数和(自身を除く): 13791789

約数列:

[1, 3, 7, 9, 21, 63, 113, 339, 791, 1017, 2373, 2909, 7119, 8727, 20363, 26181, 61089, 183267, 328717, 986151, 2301019, 2958453, 6903057, 20709171]

約数ペア:

[(1, 20709171), (3, 6903057), (7, 2958453), (9, 2301019), (21, 986151), (63, 328717), (113, 183267), (339, 61089), (791, 26181), (1017, 20363), (2373, 8727), (2909, 7119)]