18002420

素因数分解:

$2^2\times 5^1\times {\mathrm{900121}}^1$

素因数の和:900130

約数の個数: 12

約数和(自身を含む): 37805124

約数和(自身を除く): 19802704

約数列:

[1, 2, 4, 5, 10, 20, 900121, 1800242, 3600484, 4500605, 9001210, 18002420]

約数ペア:

[(1, 18002420), (2, 9001210), (4, 4500605), (5, 3600484), (10, 1800242), (20, 900121)]