201980980

素因数分解:

$2^2\times 5^1\times {\mathrm{10099049}}^1$

素因数の和:10099058

約数の個数: 12

約数和(自身を含む): 424160100

約数和(自身を除く): 222179120

約数列:

[1, 2, 4, 5, 10, 20, 10099049, 20198098, 40396196, 50495245, 100990490, 201980980]

約数ペア:

[(1, 201980980), (2, 100990490), (4, 50495245), (5, 40396196), (10, 20198098), (20, 10099049)]