21396890

素因数分解:

$2^1\times 5^1\times {\mathrm{1229}}^1\times {\mathrm{1741}}^1$

素因数の和:2977

約数の個数: 16

約数和(自身を含む): 38567880

約数和(自身を除く): 17170990

約数列:

[1, 2, 5, 10, 1229, 1741, 2458, 3482, 6145, 8705, 12290, 17410, 2139689, 4279378, 10698445, 21396890]

約数ペア:

[(1, 21396890), (2, 10698445), (5, 4279378), (10, 2139689), (1229, 17410), (1741, 12290), (2458, 8705), (3482, 6145)]