12900100

素因数分解:

$2^2\times 5^2\times {\mathrm{129001}}^1$

素因数の和:129015

約数の個数: 18

約数和(自身を含む): 27993434

約数和(自身を除く): 15093334

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 129001, 258002, 516004, 645005, 1290010, 2580020, 3225025, 6450050, 12900100]

約数ペア:

[(1, 12900100), (2, 6450050), (4, 3225025), (5, 2580020), (10, 1290010), (20, 645005), (25, 516004), (50, 258002), (100, 129001)]