8100100

素因数分解:

$2^2\times 5^2\times {\mathrm{81001}}^1$

素因数の和:81015

約数の個数: 18

約数和(自身を含む): 17577434

約数和(自身を除く): 9477334

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 81001, 162002, 324004, 405005, 810010, 1620020, 2025025, 4050050, 8100100]

約数ペア:

[(1, 8100100), (2, 4050050), (4, 2025025), (5, 1620020), (10, 810010), (20, 405005), (25, 324004), (50, 162002), (100, 81001)]