21506120

素因数分解:

$2^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{2411}}^1$

素因数の和:2645

約数の個数: 32

約数和(自身を含む): 48625920

約数和(自身を除く): 27119800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 223, 446, 892, 1115, 1784, 2230, 2411, 4460, 4822, 8920, 9644, 12055, 19288, 24110, 48220, 96440, 537653, 1075306, 2150612, 2688265, 4301224, 5376530, 10753060, 21506120]

約数ペア:

[(1, 21506120), (2, 10753060), (4, 5376530), (5, 4301224), (8, 2688265), (10, 2150612), (20, 1075306), (40, 537653), (223, 96440), (446, 48220), (892, 24110), (1115, 19288), (1784, 12055), (2230, 9644), (2411, 8920), (4460, 4822)]