21648920

素因数分解:

$2^3\times 5^1\times {\mathrm{373}}^1\times {\mathrm{1451}}^1$

素因数の和:1835

約数の個数: 32

約数和(自身を含む): 48874320

約数和(自身を除く): 27225400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 373, 746, 1451, 1492, 1865, 2902, 2984, 3730, 5804, 7255, 7460, 11608, 14510, 14920, 29020, 58040, 541223, 1082446, 2164892, 2706115, 4329784, 5412230, 10824460, 21648920]

約数ペア:

[(1, 21648920), (2, 10824460), (4, 5412230), (5, 4329784), (8, 2706115), (10, 2164892), (20, 1082446), (40, 541223), (373, 58040), (746, 29020), (1451, 14920), (1492, 14510), (1865, 11608), (2902, 7460), (2984, 7255), (3730, 5804)]