21287700

素因数分解:

$2^2\times 3^2\times 5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1$

素因数の和:167

約数の個数: 216

約数和(自身を含む): 79439360

約数和(自身を除く): 58151660

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 25, 28, 30, 31, 35, 36, 42, 45, 50, 60, 62, 63, 70, 75, 84, 90, 93, 100, 105, 109, 124, 126, 140, 150, 155, 175, 180, 186, 210, 217, 218, 225, 252, 279, 300, 310, 315, 327, 350, 372, 420, 434, 436, 450, 465, 525, 545, 558, 620, 630, 651, 654, 700, 763, 775, 868, 900, 930, 981, 1050, 1085, 1090, 1116, 1260, 1302, 1308, 1395, 1526, 1550, 1575, 1635, 1860, 1953, 1962, 2100, 2170, 2180, 2289, 2325, 2604, 2725, 2790, 3052, 3100, 3150, 3255, 3270, 3379, 3815, 3906, 3924, 4340, 4578, 4650, 4905, 5425, 5450, 5580, 6300, 6510, 6540, 6758, 6867, 6975, 7630, 7812, 8175, 9156, 9300, 9765, 9810, 10137, 10850, 10900, 11445, 13020, 13516, 13734, 13950, 15260, 16275, 16350, 16895, 19075, 19530, 19620, 20274, 21700, 22890, 23653, 24525, 27468, 27900, 30411, 32550, 32700, 33790, 34335, 38150, 39060, 40548, 45780, 47306, 48825, 49050, 50685, 57225, 60822, 65100, 67580, 68670, 70959, 76300, 84475, 94612, 97650, 98100, 101370, 114450, 118265, 121644, 137340, 141918, 152055, 168950, 171675, 195300, 202740, 212877, 228900, 236530, 253425, 283836, 304110, 337900, 343350, 354795, 425754, 473060, 506850, 591325, 608220, 686700, 709590, 760275, 851508, 1013700, 1064385, 1182650, 1419180, 1520550, 1773975, 2128770, 2365300, 3041100, 3547950, 4257540, 5321925, 7095900, 10643850, 21287700]

約数ペア:

[(1, 21287700), (2, 10643850), (3, 7095900), (4, 5321925), (5, 4257540), (6, 3547950), (7, 3041100), (9, 2365300), (10, 2128770), (12, 1773975), (14, 1520550), (15, 1419180), (18, 1182650), (20, 1064385), (21, 1013700), (25, 851508), (28, 760275), (30, 709590), (31, 686700), (35, 608220), (36, 591325), (42, 506850), (45, 473060), (50, 425754), (60, 354795), (62, 343350), (63, 337900), (70, 304110), (75, 283836), (84, 253425), (90, 236530), (93, 228900), (100, 212877), (105, 202740), (109, 195300), (124, 171675), (126, 168950), (140, 152055), (150, 141918), (155, 137340), (175, 121644), (180, 118265), (186, 114450), (210, 101370), (217, 98100), (218, 97650), (225, 94612), (252, 84475), (279, 76300), (300, 70959), (310, 68670), (315, 67580), (327, 65100), (350, 60822), (372, 57225), (420, 50685), (434, 49050), (436, 48825), (450, 47306), (465, 45780), (525, 40548), (545, 39060), (558, 38150), (620, 34335), (630, 33790), (651, 32700), (654, 32550), (700, 30411), (763, 27900), (775, 27468), (868, 24525), (900, 23653), (930, 22890), (981, 21700), (1050, 20274), (1085, 19620), (1090, 19530), (1116, 19075), (1260, 16895), (1302, 16350), (1308, 16275), (1395, 15260), (1526, 13950), (1550, 13734), (1575, 13516), (1635, 13020), (1860, 11445), (1953, 10900), (1962, 10850), (2100, 10137), (2170, 9810), (2180, 9765), (2289, 9300), (2325, 9156), (2604, 8175), (2725, 7812), (2790, 7630), (3052, 6975), (3100, 6867), (3150, 6758), (3255, 6540), (3270, 6510), (3379, 6300), (3815, 5580), (3906, 5450), (3924, 5425), (4340, 4905), (4578, 4650)]