20721400

素因数分解:

$2^3\times 5^2\times 7^1\times {\mathrm{19}}^2\times {\mathrm{41}}^1$

素因数の和:102

約数の個数: 144

約数和(自身を含む): 59527440

約数和(自身を除く): 38806040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 25, 28, 35, 38, 40, 41, 50, 56, 70, 76, 82, 95, 100, 133, 140, 152, 164, 175, 190, 200, 205, 266, 280, 287, 328, 350, 361, 380, 410, 475, 532, 574, 665, 700, 722, 760, 779, 820, 950, 1025, 1064, 1148, 1330, 1400, 1435, 1444, 1558, 1640, 1805, 1900, 2050, 2296, 2527, 2660, 2870, 2888, 3116, 3325, 3610, 3800, 3895, 4100, 5054, 5320, 5453, 5740, 6232, 6650, 7175, 7220, 7790, 8200, 9025, 10108, 10906, 11480, 12635, 13300, 14350, 14440, 14801, 15580, 18050, 19475, 20216, 21812, 25270, 26600, 27265, 28700, 29602, 31160, 36100, 38950, 43624, 50540, 54530, 57400, 59204, 63175, 72200, 74005, 77900, 101080, 103607, 109060, 118408, 126350, 136325, 148010, 155800, 207214, 218120, 252700, 272650, 296020, 370025, 414428, 505400, 518035, 545300, 592040, 740050, 828856, 1036070, 1090600, 1480100, 2072140, 2590175, 2960200, 4144280, 5180350, 10360700, 20721400]

約数ペア:

[(1, 20721400), (2, 10360700), (4, 5180350), (5, 4144280), (7, 2960200), (8, 2590175), (10, 2072140), (14, 1480100), (19, 1090600), (20, 1036070), (25, 828856), (28, 740050), (35, 592040), (38, 545300), (40, 518035), (41, 505400), (50, 414428), (56, 370025), (70, 296020), (76, 272650), (82, 252700), (95, 218120), (100, 207214), (133, 155800), (140, 148010), (152, 136325), (164, 126350), (175, 118408), (190, 109060), (200, 103607), (205, 101080), (266, 77900), (280, 74005), (287, 72200), (328, 63175), (350, 59204), (361, 57400), (380, 54530), (410, 50540), (475, 43624), (532, 38950), (574, 36100), (665, 31160), (700, 29602), (722, 28700), (760, 27265), (779, 26600), (820, 25270), (950, 21812), (1025, 20216), (1064, 19475), (1148, 18050), (1330, 15580), (1400, 14801), (1435, 14440), (1444, 14350), (1558, 13300), (1640, 12635), (1805, 11480), (1900, 10906), (2050, 10108), (2296, 9025), (2527, 8200), (2660, 7790), (2870, 7220), (2888, 7175), (3116, 6650), (3325, 6232), (3610, 5740), (3800, 5453), (3895, 5320), (4100, 5054)]