20931555

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{113}}^1\times {\mathrm{233}}^1$

素因数の和:407

約数の個数: 32

約数和(自身を含む): 34572096

約数和(自身を除く): 13640541

約数列:

[1, 3, 5, 15, 53, 113, 159, 233, 265, 339, 565, 699, 795, 1165, 1695, 3495, 5989, 12349, 17967, 26329, 29945, 37047, 61745, 78987, 89835, 131645, 185235, 394935, 1395437, 4186311, 6977185, 20931555]

約数ペア:

[(1, 20931555), (3, 6977185), (5, 4186311), (15, 1395437), (53, 394935), (113, 185235), (159, 131645), (233, 89835), (265, 78987), (339, 61745), (565, 37047), (699, 29945), (795, 26329), (1165, 17967), (1695, 12349), (3495, 5989)]