12700400

素因数分解:

$2^4\times 5^2\times {\mathrm{31751}}^1$

素因数の和:31769

約数の個数: 30

約数和(自身を含む): 30513672

約数和(自身を除く): 17813272

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 31751, 63502, 127004, 158755, 254008, 317510, 508016, 635020, 793775, 1270040, 1587550, 2540080, 3175100, 6350200, 12700400]

約数ペア:

[(1, 12700400), (2, 6350200), (4, 3175100), (5, 2540080), (8, 1587550), (10, 1270040), (16, 793775), (20, 635020), (25, 508016), (40, 317510), (50, 254008), (80, 158755), (100, 127004), (200, 63502), (400, 31751)]