21250100

素因数分解:

$2^2\times 5^2\times {\mathrm{212501}}^1$

素因数の和:212515

約数の個数: 18

約数和(自身を含む): 46112934

約数和(自身を除く): 24862834

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 212501, 425002, 850004, 1062505, 2125010, 4250020, 5312525, 10625050, 21250100]

約数ペア:

[(1, 21250100), (2, 10625050), (4, 5312525), (5, 4250020), (10, 2125010), (20, 1062505), (25, 850004), (50, 425002), (100, 212501)]