21378000

素因数分解:

$2^4\times 3^1\times 5^3\times 7^1\times {\mathrm{509}}^1$

素因数の和:542

約数の個数: 160

約数和(自身を含む): 78923520

約数和(自身を除く): 57545520

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 25, 28, 30, 35, 40, 42, 48, 50, 56, 60, 70, 75, 80, 84, 100, 105, 112, 120, 125, 140, 150, 168, 175, 200, 210, 240, 250, 280, 300, 336, 350, 375, 400, 420, 500, 509, 525, 560, 600, 700, 750, 840, 875, 1000, 1018, 1050, 1200, 1400, 1500, 1527, 1680, 1750, 2000, 2036, 2100, 2545, 2625, 2800, 3000, 3054, 3500, 3563, 4072, 4200, 5090, 5250, 6000, 6108, 7000, 7126, 7635, 8144, 8400, 10180, 10500, 10689, 12216, 12725, 14000, 14252, 15270, 17815, 20360, 21000, 21378, 24432, 25450, 28504, 30540, 35630, 38175, 40720, 42000, 42756, 50900, 53445, 57008, 61080, 63625, 71260, 76350, 85512, 89075, 101800, 106890, 122160, 127250, 142520, 152700, 171024, 178150, 190875, 203600, 213780, 254500, 267225, 285040, 305400, 356300, 381750, 427560, 445375, 509000, 534450, 610800, 712600, 763500, 855120, 890750, 1018000, 1068900, 1336125, 1425200, 1527000, 1781500, 2137800, 2672250, 3054000, 3563000, 4275600, 5344500, 7126000, 10689000, 21378000]

約数ペア:

[(1, 21378000), (2, 10689000), (3, 7126000), (4, 5344500), (5, 4275600), (6, 3563000), (7, 3054000), (8, 2672250), (10, 2137800), (12, 1781500), (14, 1527000), (15, 1425200), (16, 1336125), (20, 1068900), (21, 1018000), (24, 890750), (25, 855120), (28, 763500), (30, 712600), (35, 610800), (40, 534450), (42, 509000), (48, 445375), (50, 427560), (56, 381750), (60, 356300), (70, 305400), (75, 285040), (80, 267225), (84, 254500), (100, 213780), (105, 203600), (112, 190875), (120, 178150), (125, 171024), (140, 152700), (150, 142520), (168, 127250), (175, 122160), (200, 106890), (210, 101800), (240, 89075), (250, 85512), (280, 76350), (300, 71260), (336, 63625), (350, 61080), (375, 57008), (400, 53445), (420, 50900), (500, 42756), (509, 42000), (525, 40720), (560, 38175), (600, 35630), (700, 30540), (750, 28504), (840, 25450), (875, 24432), (1000, 21378), (1018, 21000), (1050, 20360), (1200, 17815), (1400, 15270), (1500, 14252), (1527, 14000), (1680, 12725), (1750, 12216), (2000, 10689), (2036, 10500), (2100, 10180), (2545, 8400), (2625, 8144), (2800, 7635), (3000, 7126), (3054, 7000), (3500, 6108), (3563, 6000), (4072, 5250), (4200, 5090)]