20884080

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{401}}^1$

素因数の和:455

約数の個数: 160

約数和(自身を含む): 76566528

約数和(自身を除く): 55682448

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 31, 35, 40, 42, 48, 56, 60, 62, 70, 80, 84, 93, 105, 112, 120, 124, 140, 155, 168, 186, 210, 217, 240, 248, 280, 310, 336, 372, 401, 420, 434, 465, 496, 560, 620, 651, 744, 802, 840, 868, 930, 1085, 1203, 1240, 1302, 1488, 1604, 1680, 1736, 1860, 2005, 2170, 2406, 2480, 2604, 2807, 3208, 3255, 3472, 3720, 4010, 4340, 4812, 5208, 5614, 6015, 6416, 6510, 7440, 8020, 8421, 8680, 9624, 10416, 11228, 12030, 12431, 13020, 14035, 16040, 16842, 17360, 19248, 22456, 24060, 24862, 26040, 28070, 32080, 33684, 37293, 42105, 44912, 48120, 49724, 52080, 56140, 62155, 67368, 74586, 84210, 87017, 96240, 99448, 112280, 124310, 134736, 149172, 168420, 174034, 186465, 198896, 224560, 248620, 261051, 298344, 336840, 348068, 372930, 435085, 497240, 522102, 596688, 673680, 696136, 745860, 870170, 994480, 1044204, 1305255, 1392272, 1491720, 1740340, 2088408, 2610510, 2983440, 3480680, 4176816, 5221020, 6961360, 10442040, 20884080]

約数ペア:

[(1, 20884080), (2, 10442040), (3, 6961360), (4, 5221020), (5, 4176816), (6, 3480680), (7, 2983440), (8, 2610510), (10, 2088408), (12, 1740340), (14, 1491720), (15, 1392272), (16, 1305255), (20, 1044204), (21, 994480), (24, 870170), (28, 745860), (30, 696136), (31, 673680), (35, 596688), (40, 522102), (42, 497240), (48, 435085), (56, 372930), (60, 348068), (62, 336840), (70, 298344), (80, 261051), (84, 248620), (93, 224560), (105, 198896), (112, 186465), (120, 174034), (124, 168420), (140, 149172), (155, 134736), (168, 124310), (186, 112280), (210, 99448), (217, 96240), (240, 87017), (248, 84210), (280, 74586), (310, 67368), (336, 62155), (372, 56140), (401, 52080), (420, 49724), (434, 48120), (465, 44912), (496, 42105), (560, 37293), (620, 33684), (651, 32080), (744, 28070), (802, 26040), (840, 24862), (868, 24060), (930, 22456), (1085, 19248), (1203, 17360), (1240, 16842), (1302, 16040), (1488, 14035), (1604, 13020), (1680, 12431), (1736, 12030), (1860, 11228), (2005, 10416), (2170, 9624), (2406, 8680), (2480, 8421), (2604, 8020), (2807, 7440), (3208, 6510), (3255, 6416), (3472, 6015), (3720, 5614), (4010, 5208), (4340, 4812)]