21006720

素因数分解:

$2^7\times 3^2\times 5^1\times 7^1\times {\mathrm{521}}^1$

素因数の和:553

約数の個数: 192

約数和(自身を含む): 83060640

約数和(自身を除く): 62053920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 32, 35, 36, 40, 42, 45, 48, 56, 60, 63, 64, 70, 72, 80, 84, 90, 96, 105, 112, 120, 126, 128, 140, 144, 160, 168, 180, 192, 210, 224, 240, 252, 280, 288, 315, 320, 336, 360, 384, 420, 448, 480, 504, 521, 560, 576, 630, 640, 672, 720, 840, 896, 960, 1008, 1042, 1120, 1152, 1260, 1344, 1440, 1563, 1680, 1920, 2016, 2084, 2240, 2520, 2605, 2688, 2880, 3126, 3360, 3647, 4032, 4168, 4480, 4689, 5040, 5210, 5760, 6252, 6720, 7294, 7815, 8064, 8336, 9378, 10080, 10420, 10941, 12504, 13440, 14588, 15630, 16672, 18235, 18756, 20160, 20840, 21882, 23445, 25008, 29176, 31260, 32823, 33344, 36470, 37512, 40320, 41680, 43764, 46890, 50016, 54705, 58352, 62520, 65646, 66688, 72940, 75024, 83360, 87528, 93780, 100032, 109410, 116704, 125040, 131292, 145880, 150048, 164115, 166720, 175056, 187560, 200064, 218820, 233408, 250080, 262584, 291760, 300096, 328230, 333440, 350112, 375120, 437640, 466816, 500160, 525168, 583520, 600192, 656460, 700224, 750240, 875280, 1000320, 1050336, 1167040, 1312920, 1400448, 1500480, 1750560, 2100672, 2334080, 2625840, 3000960, 3501120, 4201344, 5251680, 7002240, 10503360, 21006720]

約数ペア:

[(1, 21006720), (2, 10503360), (3, 7002240), (4, 5251680), (5, 4201344), (6, 3501120), (7, 3000960), (8, 2625840), (9, 2334080), (10, 2100672), (12, 1750560), (14, 1500480), (15, 1400448), (16, 1312920), (18, 1167040), (20, 1050336), (21, 1000320), (24, 875280), (28, 750240), (30, 700224), (32, 656460), (35, 600192), (36, 583520), (40, 525168), (42, 500160), (45, 466816), (48, 437640), (56, 375120), (60, 350112), (63, 333440), (64, 328230), (70, 300096), (72, 291760), (80, 262584), (84, 250080), (90, 233408), (96, 218820), (105, 200064), (112, 187560), (120, 175056), (126, 166720), (128, 164115), (140, 150048), (144, 145880), (160, 131292), (168, 125040), (180, 116704), (192, 109410), (210, 100032), (224, 93780), (240, 87528), (252, 83360), (280, 75024), (288, 72940), (315, 66688), (320, 65646), (336, 62520), (360, 58352), (384, 54705), (420, 50016), (448, 46890), (480, 43764), (504, 41680), (521, 40320), (560, 37512), (576, 36470), (630, 33344), (640, 32823), (672, 31260), (720, 29176), (840, 25008), (896, 23445), (960, 21882), (1008, 20840), (1042, 20160), (1120, 18756), (1152, 18235), (1260, 16672), (1344, 15630), (1440, 14588), (1563, 13440), (1680, 12504), (1920, 10941), (2016, 10420), (2084, 10080), (2240, 9378), (2520, 8336), (2605, 8064), (2688, 7815), (2880, 7294), (3126, 6720), (3360, 6252), (3647, 5760), (4032, 5210), (4168, 5040), (4480, 4689)]