25621220

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{21001}}^1$

素因数の和:21071

約数の個数: 24

約数和(自身を含む): 54689208

約数和(自身を除く): 29067988

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 21001, 42002, 84004, 105005, 210010, 420020, 1281061, 2562122, 5124244, 6405305, 12810610, 25621220]

約数ペア:

[(1, 25621220), (2, 12810610), (4, 6405305), (5, 5124244), (10, 2562122), (20, 1281061), (61, 420020), (122, 210010), (244, 105005), (305, 84004), (610, 42002), (1220, 21001)]