21648555

素因数分解:

$3^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{3461}}^1$

素因数の和:3611

約数の個数: 24

約数和(自身を含む): 37805040

約数和(自身を除く): 16156485

約数列:

[1, 3, 5, 9, 15, 45, 139, 417, 695, 1251, 2085, 3461, 6255, 10383, 17305, 31149, 51915, 155745, 481079, 1443237, 2405395, 4329711, 7216185, 21648555]

約数ペア:

[(1, 21648555), (3, 7216185), (5, 4329711), (9, 2405395), (15, 1443237), (45, 481079), (139, 155745), (417, 51915), (695, 31149), (1251, 17305), (2085, 10383), (3461, 6255)]