21990435

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{1039}}^1$

素因数の和:1147

約数の個数: 32

約数和(自身を含む): 37739520

約数和(自身を除く): 15749085

約数列:

[1, 3, 5, 15, 17, 51, 83, 85, 249, 255, 415, 1039, 1245, 1411, 3117, 4233, 5195, 7055, 15585, 17663, 21165, 52989, 86237, 88315, 258711, 264945, 431185, 1293555, 1466029, 4398087, 7330145, 21990435]

約数ペア:

[(1, 21990435), (3, 7330145), (5, 4398087), (15, 1466029), (17, 1293555), (51, 431185), (83, 264945), (85, 258711), (249, 88315), (255, 86237), (415, 52989), (1039, 21165), (1245, 17663), (1411, 15585), (3117, 7055), (4233, 5195)]