21807900

素因数分解:

$2^2\times 3^3\times 5^2\times {\mathrm{41}}^1\times {\mathrm{197}}^1$

素因数の和:261

約数の個数: 144

約数和(自身を含む): 72182880

約数和(自身を除く): 50374980

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 27, 30, 36, 41, 45, 50, 54, 60, 75, 82, 90, 100, 108, 123, 135, 150, 164, 180, 197, 205, 225, 246, 270, 300, 369, 394, 410, 450, 492, 540, 591, 615, 675, 738, 788, 820, 900, 985, 1025, 1107, 1182, 1230, 1350, 1476, 1773, 1845, 1970, 2050, 2214, 2364, 2460, 2700, 2955, 3075, 3546, 3690, 3940, 4100, 4428, 4925, 5319, 5535, 5910, 6150, 7092, 7380, 8077, 8865, 9225, 9850, 10638, 11070, 11820, 12300, 14775, 16154, 17730, 18450, 19700, 21276, 22140, 24231, 26595, 27675, 29550, 32308, 35460, 36900, 40385, 44325, 48462, 53190, 55350, 59100, 72693, 80770, 88650, 96924, 106380, 110700, 121155, 132975, 145386, 161540, 177300, 201925, 218079, 242310, 265950, 290772, 363465, 403850, 436158, 484620, 531900, 605775, 726930, 807700, 872316, 1090395, 1211550, 1453860, 1817325, 2180790, 2423100, 3634650, 4361580, 5451975, 7269300, 10903950, 21807900]

約数ペア:

[(1, 21807900), (2, 10903950), (3, 7269300), (4, 5451975), (5, 4361580), (6, 3634650), (9, 2423100), (10, 2180790), (12, 1817325), (15, 1453860), (18, 1211550), (20, 1090395), (25, 872316), (27, 807700), (30, 726930), (36, 605775), (41, 531900), (45, 484620), (50, 436158), (54, 403850), (60, 363465), (75, 290772), (82, 265950), (90, 242310), (100, 218079), (108, 201925), (123, 177300), (135, 161540), (150, 145386), (164, 132975), (180, 121155), (197, 110700), (205, 106380), (225, 96924), (246, 88650), (270, 80770), (300, 72693), (369, 59100), (394, 55350), (410, 53190), (450, 48462), (492, 44325), (540, 40385), (591, 36900), (615, 35460), (675, 32308), (738, 29550), (788, 27675), (820, 26595), (900, 24231), (985, 22140), (1025, 21276), (1107, 19700), (1182, 18450), (1230, 17730), (1350, 16154), (1476, 14775), (1773, 12300), (1845, 11820), (1970, 11070), (2050, 10638), (2214, 9850), (2364, 9225), (2460, 8865), (2700, 8077), (2955, 7380), (3075, 7092), (3546, 6150), (3690, 5910), (3940, 5535), (4100, 5319), (4428, 4925)]