21137452

素因数分解:

$2^2\times 7^1\times {\mathrm{139}}^1\times {\mathrm{5431}}^1$

素因数の和:5581

約数の個数: 24

約数和(自身を含む): 42586880

約数和(自身を除く): 21449428

約数列:

[1, 2, 4, 7, 14, 28, 139, 278, 556, 973, 1946, 3892, 5431, 10862, 21724, 38017, 76034, 152068, 754909, 1509818, 3019636, 5284363, 10568726, 21137452]

約数ペア:

[(1, 21137452), (2, 10568726), (4, 5284363), (7, 3019636), (14, 1509818), (28, 754909), (139, 152068), (278, 76034), (556, 38017), (973, 21724), (1946, 10862), (3892, 5431)]