20180400

素因数分解:

$2^4\times 3^1\times 5^2\times {\mathrm{67}}^1\times {\mathrm{251}}^1$

素因数の和:339

約数の個数: 120

約数和(自身を含む): 65870784

約数和(自身を除く): 45690384

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 25, 30, 40, 48, 50, 60, 67, 75, 80, 100, 120, 134, 150, 200, 201, 240, 251, 268, 300, 335, 400, 402, 502, 536, 600, 670, 753, 804, 1004, 1005, 1072, 1200, 1255, 1340, 1506, 1608, 1675, 2008, 2010, 2510, 2680, 3012, 3216, 3350, 3765, 4016, 4020, 5020, 5025, 5360, 6024, 6275, 6700, 7530, 8040, 10040, 10050, 12048, 12550, 13400, 15060, 16080, 16817, 18825, 20080, 20100, 25100, 26800, 30120, 33634, 37650, 40200, 50200, 50451, 60240, 67268, 75300, 80400, 84085, 100400, 100902, 134536, 150600, 168170, 201804, 252255, 269072, 301200, 336340, 403608, 420425, 504510, 672680, 807216, 840850, 1009020, 1261275, 1345360, 1681700, 2018040, 2522550, 3363400, 4036080, 5045100, 6726800, 10090200, 20180400]

約数ペア:

[(1, 20180400), (2, 10090200), (3, 6726800), (4, 5045100), (5, 4036080), (6, 3363400), (8, 2522550), (10, 2018040), (12, 1681700), (15, 1345360), (16, 1261275), (20, 1009020), (24, 840850), (25, 807216), (30, 672680), (40, 504510), (48, 420425), (50, 403608), (60, 336340), (67, 301200), (75, 269072), (80, 252255), (100, 201804), (120, 168170), (134, 150600), (150, 134536), (200, 100902), (201, 100400), (240, 84085), (251, 80400), (268, 75300), (300, 67268), (335, 60240), (400, 50451), (402, 50200), (502, 40200), (536, 37650), (600, 33634), (670, 30120), (753, 26800), (804, 25100), (1004, 20100), (1005, 20080), (1072, 18825), (1200, 16817), (1255, 16080), (1340, 15060), (1506, 13400), (1608, 12550), (1675, 12048), (2008, 10050), (2010, 10040), (2510, 8040), (2680, 7530), (3012, 6700), (3216, 6275), (3350, 6024), (3765, 5360), (4016, 5025), (4020, 5020)]