21253680

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{4217}}^1$

素因数の和:4243

約数の個数: 120

約数和(自身を含む): 81592992

約数和(自身を除く): 60339312

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 48, 56, 60, 63, 70, 72, 80, 84, 90, 105, 112, 120, 126, 140, 144, 168, 180, 210, 240, 252, 280, 315, 336, 360, 420, 504, 560, 630, 720, 840, 1008, 1260, 1680, 2520, 4217, 5040, 8434, 12651, 16868, 21085, 25302, 29519, 33736, 37953, 42170, 50604, 59038, 63255, 67472, 75906, 84340, 88557, 101208, 118076, 126510, 147595, 151812, 168680, 177114, 189765, 202416, 236152, 253020, 265671, 295190, 303624, 337360, 354228, 379530, 442785, 472304, 506040, 531342, 590380, 607248, 708456, 759060, 885570, 1012080, 1062684, 1180760, 1328355, 1416912, 1518120, 1771140, 2125368, 2361520, 2656710, 3036240, 3542280, 4250736, 5313420, 7084560, 10626840, 21253680]

約数ペア:

[(1, 21253680), (2, 10626840), (3, 7084560), (4, 5313420), (5, 4250736), (6, 3542280), (7, 3036240), (8, 2656710), (9, 2361520), (10, 2125368), (12, 1771140), (14, 1518120), (15, 1416912), (16, 1328355), (18, 1180760), (20, 1062684), (21, 1012080), (24, 885570), (28, 759060), (30, 708456), (35, 607248), (36, 590380), (40, 531342), (42, 506040), (45, 472304), (48, 442785), (56, 379530), (60, 354228), (63, 337360), (70, 303624), (72, 295190), (80, 265671), (84, 253020), (90, 236152), (105, 202416), (112, 189765), (120, 177114), (126, 168680), (140, 151812), (144, 147595), (168, 126510), (180, 118076), (210, 101208), (240, 88557), (252, 84340), (280, 75906), (315, 67472), (336, 63255), (360, 59038), (420, 50604), (504, 42170), (560, 37953), (630, 33736), (720, 29519), (840, 25302), (1008, 21085), (1260, 16868), (1680, 12651), (2520, 8434), (4217, 5040)]