220180

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{109}}^1$

素因数の和:219

約数の個数: 24

約数和(自身を含む): 471240

約数和(自身を除く): 251060

約数列:

[1, 2, 4, 5, 10, 20, 101, 109, 202, 218, 404, 436, 505, 545, 1010, 1090, 2020, 2180, 11009, 22018, 44036, 55045, 110090, 220180]

約数ペア:

[(1, 220180), (2, 110090), (4, 55045), (5, 44036), (10, 22018), (20, 11009), (101, 2180), (109, 2020), (202, 1090), (218, 1010), (404, 545), (436, 505)]