20805680

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{701}}^1$

素因数の和:774

約数の個数: 80

約数和(自身を含む): 56407104

約数和(自身を除く): 35601424

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 53, 56, 70, 80, 106, 112, 140, 212, 265, 280, 371, 424, 530, 560, 701, 742, 848, 1060, 1402, 1484, 1855, 2120, 2804, 2968, 3505, 3710, 4240, 4907, 5608, 5936, 7010, 7420, 9814, 11216, 14020, 14840, 19628, 24535, 28040, 29680, 37153, 39256, 49070, 56080, 74306, 78512, 98140, 148612, 185765, 196280, 260071, 297224, 371530, 392560, 520142, 594448, 743060, 1040284, 1300355, 1486120, 2080568, 2600710, 2972240, 4161136, 5201420, 10402840, 20805680]

約数ペア:

[(1, 20805680), (2, 10402840), (4, 5201420), (5, 4161136), (7, 2972240), (8, 2600710), (10, 2080568), (14, 1486120), (16, 1300355), (20, 1040284), (28, 743060), (35, 594448), (40, 520142), (53, 392560), (56, 371530), (70, 297224), (80, 260071), (106, 196280), (112, 185765), (140, 148612), (212, 98140), (265, 78512), (280, 74306), (371, 56080), (424, 49070), (530, 39256), (560, 37153), (701, 29680), (742, 28040), (848, 24535), (1060, 19628), (1402, 14840), (1484, 14020), (1855, 11216), (2120, 9814), (2804, 7420), (2968, 7010), (3505, 5936), (3710, 5608), (4240, 4907)]