20810575

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{257}}^1$

素因数の和:387

約数の個数: 24

約数和(自身を含む): 26873280

約数和(自身を除く): 6062705

約数列:

[1, 5, 25, 41, 79, 205, 257, 395, 1025, 1285, 1975, 3239, 6425, 10537, 16195, 20303, 52685, 80975, 101515, 263425, 507575, 832423, 4162115, 20810575]

約数ペア:

[(1, 20810575), (5, 4162115), (25, 832423), (41, 507575), (79, 263425), (205, 101515), (257, 80975), (395, 52685), (1025, 20303), (1285, 16195), (1975, 10537), (3239, 6425)]