21129640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{193}}^1$

素因数の和:251

約数の個数: 128

約数和(自身を含む): 60341760

約数和(自身を除く): 39212120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 23, 28, 34, 35, 40, 46, 56, 68, 70, 85, 92, 115, 119, 136, 140, 161, 170, 184, 193, 230, 238, 280, 322, 340, 386, 391, 460, 476, 595, 644, 680, 772, 782, 805, 920, 952, 965, 1190, 1288, 1351, 1544, 1564, 1610, 1930, 1955, 2380, 2702, 2737, 3128, 3220, 3281, 3860, 3910, 4439, 4760, 5404, 5474, 6440, 6562, 6755, 7720, 7820, 8878, 10808, 10948, 13124, 13510, 13685, 15640, 16405, 17756, 21896, 22195, 22967, 26248, 27020, 27370, 31073, 32810, 35512, 44390, 45934, 54040, 54740, 62146, 65620, 75463, 88780, 91868, 109480, 114835, 124292, 131240, 150926, 155365, 177560, 183736, 229670, 248584, 301852, 310730, 377315, 459340, 528241, 603704, 621460, 754630, 918680, 1056482, 1242920, 1509260, 2112964, 2641205, 3018520, 4225928, 5282410, 10564820, 21129640]

約数ペア:

[(1, 21129640), (2, 10564820), (4, 5282410), (5, 4225928), (7, 3018520), (8, 2641205), (10, 2112964), (14, 1509260), (17, 1242920), (20, 1056482), (23, 918680), (28, 754630), (34, 621460), (35, 603704), (40, 528241), (46, 459340), (56, 377315), (68, 310730), (70, 301852), (85, 248584), (92, 229670), (115, 183736), (119, 177560), (136, 155365), (140, 150926), (161, 131240), (170, 124292), (184, 114835), (193, 109480), (230, 91868), (238, 88780), (280, 75463), (322, 65620), (340, 62146), (386, 54740), (391, 54040), (460, 45934), (476, 44390), (595, 35512), (644, 32810), (680, 31073), (772, 27370), (782, 27020), (805, 26248), (920, 22967), (952, 22195), (965, 21896), (1190, 17756), (1288, 16405), (1351, 15640), (1544, 13685), (1564, 13510), (1610, 13124), (1930, 10948), (1955, 10808), (2380, 8878), (2702, 7820), (2737, 7720), (3128, 6755), (3220, 6562), (3281, 6440), (3860, 5474), (3910, 5404), (4439, 4760)]