420400

素因数分解:

$2^4\times 5^2\times {\mathrm{1051}}^1$

素因数の和:1069

約数の個数: 30

約数和(自身を含む): 1010972

約数和(自身を除く): 590572

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 1051, 2102, 4204, 5255, 8408, 10510, 16816, 21020, 26275, 42040, 52550, 84080, 105100, 210200, 420400]

約数ペア:

[(1, 420400), (2, 210200), (4, 105100), (5, 84080), (8, 52550), (10, 42040), (16, 26275), (20, 21020), (25, 16816), (40, 10510), (50, 8408), (80, 5255), (100, 4204), (200, 2102), (400, 1051)]