21415405

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{401}}^1\times {\mathrm{971}}^1$

素因数の和:1388

約数の個数: 16

約数和(自身を含む): 28133568

約数和(自身を除く): 6718163

約数列:

[1, 5, 11, 55, 401, 971, 2005, 4411, 4855, 10681, 22055, 53405, 389371, 1946855, 4283081, 21415405]

約数ペア:

[(1, 21415405), (5, 4283081), (11, 1946855), (55, 389371), (401, 53405), (971, 22055), (2005, 10681), (4411, 4855)]