19992560

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{1879}}^1$

素因数の和:1918

約数の個数: 80

約数和(自身を含む): 55948800

約数和(自身を除く): 35956240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 35, 38, 40, 56, 70, 76, 80, 95, 112, 133, 140, 152, 190, 266, 280, 304, 380, 532, 560, 665, 760, 1064, 1330, 1520, 1879, 2128, 2660, 3758, 5320, 7516, 9395, 10640, 13153, 15032, 18790, 26306, 30064, 35701, 37580, 52612, 65765, 71402, 75160, 105224, 131530, 142804, 150320, 178505, 210448, 249907, 263060, 285608, 357010, 499814, 526120, 571216, 714020, 999628, 1052240, 1249535, 1428040, 1999256, 2499070, 2856080, 3998512, 4998140, 9996280, 19992560]

約数ペア:

[(1, 19992560), (2, 9996280), (4, 4998140), (5, 3998512), (7, 2856080), (8, 2499070), (10, 1999256), (14, 1428040), (16, 1249535), (19, 1052240), (20, 999628), (28, 714020), (35, 571216), (38, 526120), (40, 499814), (56, 357010), (70, 285608), (76, 263060), (80, 249907), (95, 210448), (112, 178505), (133, 150320), (140, 142804), (152, 131530), (190, 105224), (266, 75160), (280, 71402), (304, 65765), (380, 52612), (532, 37580), (560, 35701), (665, 30064), (760, 26306), (1064, 18790), (1330, 15032), (1520, 13153), (1879, 10640), (2128, 9395), (2660, 7516), (3758, 5320)]