21257313

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{4001}}^1$

素因数の和:4045

約数の個数: 32

約数和(自身を含む): 36882432

約数和(自身を除く): 15625119

約数列:

[1, 3, 7, 11, 21, 23, 33, 69, 77, 161, 231, 253, 483, 759, 1771, 4001, 5313, 12003, 28007, 44011, 84021, 92023, 132033, 276069, 308077, 644161, 924231, 1012253, 1932483, 3036759, 7085771, 21257313]

約数ペア:

[(1, 21257313), (3, 7085771), (7, 3036759), (11, 1932483), (21, 1012253), (23, 924231), (33, 644161), (69, 308077), (77, 276069), (161, 132033), (231, 92023), (253, 84021), (483, 44011), (759, 28007), (1771, 12003), (4001, 5313)]