138720939

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{409}}^1\times {\mathrm{521}}^1$

素因数の和:971

約数の個数: 32

約数和(自身を含む): 219156480

約数和(自身を除く): 80435541

約数列:

[1, 3, 7, 21, 31, 93, 217, 409, 521, 651, 1227, 1563, 2863, 3647, 8589, 10941, 12679, 16151, 38037, 48453, 88753, 113057, 213089, 266259, 339171, 639267, 1491623, 4474869, 6605759, 19817277, 46240313, 138720939]

約数ペア:

[(1, 138720939), (3, 46240313), (7, 19817277), (21, 6605759), (31, 4474869), (93, 1491623), (217, 639267), (409, 339171), (521, 266259), (651, 213089), (1227, 113057), (1563, 88753), (2863, 48453), (3647, 38037), (8589, 16151), (10941, 12679)]