638679680

素因数分解:

$2^7\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{991}}^1$

素因数の和:1082

約数の個数: 128

約数和(自身を含む): 1639180800

約数和(自身を除く): 1000501120

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 53, 64, 76, 80, 95, 106, 128, 152, 160, 190, 212, 265, 304, 320, 380, 424, 530, 608, 640, 760, 848, 991, 1007, 1060, 1216, 1520, 1696, 1982, 2014, 2120, 2432, 3040, 3392, 3964, 4028, 4240, 4955, 5035, 6080, 6784, 7928, 8056, 8480, 9910, 10070, 12160, 15856, 16112, 16960, 18829, 19820, 20140, 31712, 32224, 33920, 37658, 39640, 40280, 52523, 63424, 64448, 75316, 79280, 80560, 94145, 105046, 126848, 128896, 150632, 158560, 161120, 188290, 210092, 262615, 301264, 317120, 322240, 376580, 420184, 525230, 602528, 634240, 644480, 753160, 840368, 997937, 1050460, 1205056, 1506320, 1680736, 1995874, 2100920, 2410112, 3012640, 3361472, 3991748, 4201840, 4989685, 6025280, 6722944, 7983496, 8403680, 9979370, 12050560, 15966992, 16807360, 19958740, 31933984, 33614720, 39917480, 63867968, 79834960, 127735936, 159669920, 319339840, 638679680]

約数ペア:

[(1, 638679680), (2, 319339840), (4, 159669920), (5, 127735936), (8, 79834960), (10, 63867968), (16, 39917480), (19, 33614720), (20, 31933984), (32, 19958740), (38, 16807360), (40, 15966992), (53, 12050560), (64, 9979370), (76, 8403680), (80, 7983496), (95, 6722944), (106, 6025280), (128, 4989685), (152, 4201840), (160, 3991748), (190, 3361472), (212, 3012640), (265, 2410112), (304, 2100920), (320, 1995874), (380, 1680736), (424, 1506320), (530, 1205056), (608, 1050460), (640, 997937), (760, 840368), (848, 753160), (991, 644480), (1007, 634240), (1060, 602528), (1216, 525230), (1520, 420184), (1696, 376580), (1982, 322240), (2014, 317120), (2120, 301264), (2432, 262615), (3040, 210092), (3392, 188290), (3964, 161120), (4028, 158560), (4240, 150632), (4955, 128896), (5035, 126848), (6080, 105046), (6784, 94145), (7928, 80560), (8056, 79280), (8480, 75316), (9910, 64448), (10070, 63424), (12160, 52523), (15856, 40280), (16112, 39640), (16960, 37658), (18829, 33920), (19820, 32224), (20140, 31712)]