21457887

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{103}}^1\times {\mathrm{107}}^1$

素因数の和:283

約数の個数: 32

約数和(自身を含む): 32348160

約数和(自身を除く): 10890273

約数列:

[1, 3, 11, 33, 59, 103, 107, 177, 309, 321, 649, 1133, 1177, 1947, 3399, 3531, 6077, 6313, 11021, 18231, 18939, 33063, 66847, 69443, 121231, 200541, 208329, 363693, 650239, 1950717, 7152629, 21457887]

約数ペア:

[(1, 21457887), (3, 7152629), (11, 1950717), (33, 650239), (59, 363693), (103, 208329), (107, 200541), (177, 121231), (309, 69443), (321, 66847), (649, 33063), (1133, 18939), (1177, 18231), (1947, 11021), (3399, 6313), (3531, 6077)]