100200400

素因数分解:

$2^4\times 5^2\times {\mathrm{250501}}^1$

素因数の和:250519

約数の個数: 30

約数和(自身を含む): 240732422

約数和(自身を除く): 140532022

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 250501, 501002, 1002004, 1252505, 2004008, 2505010, 4008016, 5010020, 6262525, 10020040, 12525050, 20040080, 25050100, 50100200, 100200400]

約数ペア:

[(1, 100200400), (2, 50100200), (4, 25050100), (5, 20040080), (8, 12525050), (10, 10020040), (16, 6262525), (20, 5010020), (25, 4008016), (40, 2505010), (50, 2004008), (80, 1252505), (100, 1002004), (200, 501002), (400, 250501)]