21000400

素因数分解:

$2^4\times 5^2\times {\mathrm{52501}}^1$

素因数の和:52519

約数の個数: 30

約数和(自身を含む): 50454422

約数和(自身を除く): 29454022

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 52501, 105002, 210004, 262505, 420008, 525010, 840016, 1050020, 1312525, 2100040, 2625050, 4200080, 5250100, 10500200, 21000400]

約数ペア:

[(1, 21000400), (2, 10500200), (4, 5250100), (5, 4200080), (8, 2625050), (10, 2100040), (16, 1312525), (20, 1050020), (25, 840016), (40, 525010), (50, 420008), (80, 262505), (100, 210004), (200, 105002), (400, 52501)]