19965990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{3559}}^1$

素因数の和:3597

約数の個数: 64

約数和(自身を含む): 55365120

約数和(自身を除く): 35399130

約数列:

[1, 2, 3, 5, 6, 10, 11, 15, 17, 22, 30, 33, 34, 51, 55, 66, 85, 102, 110, 165, 170, 187, 255, 330, 374, 510, 561, 935, 1122, 1870, 2805, 3559, 5610, 7118, 10677, 17795, 21354, 35590, 39149, 53385, 60503, 78298, 106770, 117447, 121006, 181509, 195745, 234894, 302515, 363018, 391490, 587235, 605030, 665533, 907545, 1174470, 1331066, 1815090, 1996599, 3327665, 3993198, 6655330, 9982995, 19965990]

約数ペア:

[(1, 19965990), (2, 9982995), (3, 6655330), (5, 3993198), (6, 3327665), (10, 1996599), (11, 1815090), (15, 1331066), (17, 1174470), (22, 907545), (30, 665533), (33, 605030), (34, 587235), (51, 391490), (55, 363018), (66, 302515), (85, 234894), (102, 195745), (110, 181509), (165, 121006), (170, 117447), (187, 106770), (255, 78298), (330, 60503), (374, 53385), (510, 39149), (561, 35590), (935, 21354), (1122, 17795), (1870, 10677), (2805, 7118), (3559, 5610)]