21700400

素因数分解:

$2^4\times 5^2\times {\mathrm{54251}}^1$

素因数の和:54269

約数の個数: 30

約数和(自身を含む): 52136172

約数和(自身を除く): 30435772

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 54251, 108502, 217004, 271255, 434008, 542510, 868016, 1085020, 1356275, 2170040, 2712550, 4340080, 5425100, 10850200, 21700400]

約数ペア:

[(1, 21700400), (2, 10850200), (4, 5425100), (5, 4340080), (8, 2712550), (10, 2170040), (16, 1356275), (20, 1085020), (25, 868016), (40, 542510), (50, 434008), (80, 271255), (100, 217004), (200, 108502), (400, 54251)]