20671385

素因数分解:

$5^1\times 7^2\times {\mathrm{139}}^1\times {\mathrm{607}}^1$

素因数の和:765

約数の個数: 24

約数和(自身を含む): 29111040

約数和(自身を除く): 8439655

約数列:

[1, 5, 7, 35, 49, 139, 245, 607, 695, 973, 3035, 4249, 4865, 6811, 21245, 29743, 34055, 84373, 148715, 421865, 590611, 2953055, 4134277, 20671385]

約数ペア:

[(1, 20671385), (5, 4134277), (7, 2953055), (35, 590611), (49, 421865), (139, 148715), (245, 84373), (607, 34055), (695, 29743), (973, 21245), (3035, 6811), (4249, 4865)]