21026180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{1487}}^1$

素因数の和:1604

約数の個数: 48

約数和(自身を含む): 50996736

約数和(自身を除く): 29970556

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 101, 140, 202, 404, 505, 707, 1010, 1414, 1487, 2020, 2828, 2974, 3535, 5948, 7070, 7435, 10409, 14140, 14870, 20818, 29740, 41636, 52045, 104090, 150187, 208180, 300374, 600748, 750935, 1051309, 1501870, 2102618, 3003740, 4205236, 5256545, 10513090, 21026180]

約数ペア:

[(1, 21026180), (2, 10513090), (4, 5256545), (5, 4205236), (7, 3003740), (10, 2102618), (14, 1501870), (20, 1051309), (28, 750935), (35, 600748), (70, 300374), (101, 208180), (140, 150187), (202, 104090), (404, 52045), (505, 41636), (707, 29740), (1010, 20818), (1414, 14870), (1487, 14140), (2020, 10409), (2828, 7435), (2974, 7070), (3535, 5948)]