21520059

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{113}}^1\times {\mathrm{199}}^1$

素因数の和:355

約数の個数: 32

約数和(自身を含む): 32832000

約数和(自身を除く): 11311941

約数列:

[1, 3, 11, 29, 33, 87, 113, 199, 319, 339, 597, 957, 1243, 2189, 3277, 3729, 5771, 6567, 9831, 17313, 22487, 36047, 63481, 67461, 108141, 190443, 247357, 652123, 742071, 1956369, 7173353, 21520059]

約数ペア:

[(1, 21520059), (3, 7173353), (11, 1956369), (29, 742071), (33, 652123), (87, 247357), (113, 190443), (199, 108141), (319, 67461), (339, 63481), (597, 36047), (957, 22487), (1243, 17313), (2189, 9831), (3277, 6567), (3729, 5771)]