20199280

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{137}}^1$

素因数の和:266

約数の個数: 80

約数和(自身を含む): 50309280

約数和(自身を除く): 30110000

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 97, 137, 152, 190, 194, 274, 304, 380, 388, 485, 548, 685, 760, 776, 970, 1096, 1370, 1520, 1552, 1843, 1940, 2192, 2603, 2740, 3686, 3880, 5206, 5480, 7372, 7760, 9215, 10412, 10960, 13015, 13289, 14744, 18430, 20824, 26030, 26578, 29488, 36860, 41648, 52060, 53156, 66445, 73720, 104120, 106312, 132890, 147440, 208240, 212624, 252491, 265780, 504982, 531560, 1009964, 1063120, 1262455, 2019928, 2524910, 4039856, 5049820, 10099640, 20199280]

約数ペア:

[(1, 20199280), (2, 10099640), (4, 5049820), (5, 4039856), (8, 2524910), (10, 2019928), (16, 1262455), (19, 1063120), (20, 1009964), (38, 531560), (40, 504982), (76, 265780), (80, 252491), (95, 212624), (97, 208240), (137, 147440), (152, 132890), (190, 106312), (194, 104120), (274, 73720), (304, 66445), (380, 53156), (388, 52060), (485, 41648), (548, 36860), (685, 29488), (760, 26578), (776, 26030), (970, 20824), (1096, 18430), (1370, 14744), (1520, 13289), (1552, 13015), (1843, 10960), (1940, 10412), (2192, 9215), (2603, 7760), (2740, 7372), (3686, 5480), (3880, 5206)]