21400749

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{107}}^1\times {\mathrm{313}}^1$

素因数の和:497

約数の個数: 24

約数和(自身を含む): 31741632

約数和(自身を除く): 10340883

約数列:

[1, 3, 9, 71, 107, 213, 313, 321, 639, 939, 963, 2817, 7597, 22223, 22791, 33491, 66669, 68373, 100473, 200007, 301419, 2377861, 7133583, 21400749]

約数ペア:

[(1, 21400749), (3, 7133583), (9, 2377861), (71, 301419), (107, 200007), (213, 100473), (313, 68373), (321, 66669), (639, 33491), (939, 22791), (963, 22223), (2817, 7597)]