18006280

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{4457}}^1$

素因数の和:4569

約数の個数: 32

約数和(自身を含む): 40924440

約数和(自身を除く): 22918160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 4457, 8914, 17828, 22285, 35656, 44570, 89140, 178280, 450157, 900314, 1800628, 2250785, 3601256, 4501570, 9003140, 18006280]

約数ペア:

[(1, 18006280), (2, 9003140), (4, 4501570), (5, 3601256), (8, 2250785), (10, 1800628), (20, 900314), (40, 450157), (101, 178280), (202, 89140), (404, 44570), (505, 35656), (808, 22285), (1010, 17828), (2020, 8914), (4040, 4457)]