21409264

素因数分解:

$2^4\times {\mathrm{137}}^1\times {\mathrm{9767}}^1$

素因数の和:9912

約数の個数: 20

約数和(自身を含む): 41787504

約数和(自身を除く): 20378240

約数列:

[1, 2, 4, 8, 16, 137, 274, 548, 1096, 2192, 9767, 19534, 39068, 78136, 156272, 1338079, 2676158, 5352316, 10704632, 21409264]

約数ペア:

[(1, 21409264), (2, 10704632), (4, 5352316), (8, 2676158), (16, 1338079), (137, 156272), (274, 78136), (548, 39068), (1096, 19534), (2192, 9767)]