21689395

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{653}}^1$

素因数の和:751

約数の個数: 32

約数和(自身を含む): 32522112

約数和(自身を除く): 10832717

約数列:

[1, 5, 7, 13, 35, 65, 73, 91, 365, 455, 511, 653, 949, 2555, 3265, 4571, 4745, 6643, 8489, 22855, 33215, 42445, 47669, 59423, 238345, 297115, 333683, 619697, 1668415, 3098485, 4337879, 21689395]

約数ペア:

[(1, 21689395), (5, 4337879), (7, 3098485), (13, 1668415), (35, 619697), (65, 333683), (73, 297115), (91, 238345), (365, 59423), (455, 47669), (511, 42445), (653, 33215), (949, 22855), (2555, 8489), (3265, 6643), (4571, 4745)]