21481570

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{401}}^1\times {\mathrm{487}}^1$

素因数の和:906

約数の個数: 32

約数和(自身を含む): 42374016

約数和(自身を除く): 20892446

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 401, 487, 802, 974, 2005, 2435, 4010, 4411, 4870, 5357, 8822, 10714, 22055, 26785, 44110, 53570, 195287, 390574, 976435, 1952870, 2148157, 4296314, 10740785, 21481570]

約数ペア:

[(1, 21481570), (2, 10740785), (5, 4296314), (10, 2148157), (11, 1952870), (22, 976435), (55, 390574), (110, 195287), (401, 53570), (487, 44110), (802, 26785), (974, 22055), (2005, 10714), (2435, 8822), (4010, 5357), (4411, 4870)]