21381290

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{281}}^1\times {\mathrm{1087}}^1$

素因数の和:1382

約数の個数: 32

約数和(自身を含む): 44181504

約数和(自身を除く): 22800214

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 281, 562, 1087, 1405, 1967, 2174, 2810, 3934, 5435, 7609, 9835, 10870, 15218, 19670, 38045, 76090, 305447, 610894, 1527235, 2138129, 3054470, 4276258, 10690645, 21381290]

約数ペア:

[(1, 21381290), (2, 10690645), (5, 4276258), (7, 3054470), (10, 2138129), (14, 1527235), (35, 610894), (70, 305447), (281, 76090), (562, 38045), (1087, 19670), (1405, 15218), (1967, 10870), (2174, 9835), (2810, 7609), (3934, 5435)]