21028400

素因数分解:

$2^4\times 5^2\times {\mathrm{52571}}^1$

素因数の和:52589

約数の個数: 30

約数和(自身を含む): 50521692

約数和(自身を除く): 29493292

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 52571, 105142, 210284, 262855, 420568, 525710, 841136, 1051420, 1314275, 2102840, 2628550, 4205680, 5257100, 10514200, 21028400]

約数ペア:

[(1, 21028400), (2, 10514200), (4, 5257100), (5, 4205680), (8, 2628550), (10, 2102840), (16, 1314275), (20, 1051420), (25, 841136), (40, 525710), (50, 420568), (80, 262855), (100, 210284), (200, 105142), (400, 52571)]