21145328

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{69557}}^1$

素因数の和:69584

約数の個数: 20

約数和(自身を含む): 43125960

約数和(自身を除く): 21980632

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 69557, 139114, 278228, 556456, 1112912, 1321583, 2643166, 5286332, 10572664, 21145328]

約数ペア:

[(1, 21145328), (2, 10572664), (4, 5286332), (8, 2643166), (16, 1321583), (19, 1112912), (38, 556456), (76, 278228), (152, 139114), (304, 69557)]